Jump to content

Recommended Posts

Posted

Oh wise and wondrous watch gurus....

I have a Timex T49878: https://www.amazon.ca/Timex-T49878-Expedition-Military-Field/dp/B006KY5V0O 

It has sentimental value and I am trying to get it working again.

Specs:

Caliber: M905
Linge Size: 13½
Thickness (MM): 3.65mm
Hand Size: 120/70/20
Stem: 401-2017
Cell/Battery/Power Source: 2016
Tap Size: 10
Includes: Protective Case, Stem, and Power source.
Other Information: INDIGLO

I managed to find a new stem (401-2017)

Now I need a crown and it looks like a short post is used to operate the “glo”, but it isn’t clear what the length of the post.   

Can anyone identify a crown that I could use or indicate what I should be looking for ? 

 

 

  

Posted

Thanks for the prompt reply. Much appreciated.

Unfortunately, Cousins customer service has been either unwilling or unable to answer this question.  

I ordered the stem from Cousins and asked what crown I could use but so far all I have received is a runaround to what would seem a simple question from a company that theoretically has a expertise in this field. 

So far I have received a better reply from Chinese sellers on eBay than Cousins.

 

     

 

 

Posted

Hi MilTime,

Although I'm not familiar with Timex watches much, if you only require a crown, -- and you don't have the original -- you need to estimate the dimensions and find one among the supplier's listed ones. That's normal procedure....

Cheers,

Bob

Posted
On 9/7/2016 at 9:36 PM, bobm12 said:

Hi MilTime,

Although I'm not familiar with Timex watches much, if you only require a crown, -- and you don't have the original -- you need to estimate the dimensions and find one among the supplier's listed ones. That's normal procedure....

Cheers,

Bob

Many thanks Bobm12

Very useful info, new to this so its like groping in the dark at some points.

I found a hi-res pic online that is getting me closer.

I am waiting on the delivery of a digital caliper to measure the stem post on the case.

I suspect from the picture below that the rubber seal(s) are on the inside of the crown and the crown covers the stem post for waterproofing.

So once I can measure the stem post on the case, I suspect that I will be moving closer to target.  

s-l1600 (3).jpg

Posted

Correct, you need to measure the tube (outside diameter) where the crown inserts (case side). You will also measure the clearance where the crown will eventually sit (case side). Finally you will eye ball (with the help of the caliper if you would) the height (thickness?) of the crown or to be more specific, how much would it, once seated in its normal watch wearing position, will it protrude.

Eventually you will find a standard crown (water proof) that will fit the dimensions you come up with plus or minus...not really exact.

Esslinger makes the choice a little easier because of the way their page is structured so that would be a starting point to check on dimensions. Afterwards you can order from your preferred supplier. I would go by the ones without post (fail safe) unless I know the diameter of the post will fit the tube (inner diameter of tube).

  • Like 1
Posted (edited)
9 hours ago, bobm12 said:

Correct, you need to measure the tube (outside diameter) where the crown inserts (case side). You will also measure the clearance where the crown will eventually sit (case side). Finally you will eye ball (with the help of the caliper if you would) the height (thickness?) of the crown or to be more specific, how much would it, once seated in its normal watch wearing position, will it protrude.

Eventually you will find a standard crown (water proof) that will fit the dimensions you come up with plus or minus...not really exact.

Esslinger makes the choice a little easier because of the way their page is structured so that would be a starting point to check on dimensions. Afterwards you can order from your preferred supplier. I would go by the ones without post (fail safe) unless I know the diameter of the post will fit the tube (inner diameter of tube).

Many thanks for that Bob, thats extremely useful information !

Now I am moving forward ! :biggrin:

Edited by MilTimeCan
Posted

Most Timex watches that I had the misfortune to handle all those years ago. The buttons just pushed on, the stem never had a thread to take a screw on button. We used to send the little buggers to Scotland I think it was Dundee, someone on here will tell me If I've got the wrong town. The reason we sent them away they were not worth repairing.

  • 3 weeks later...
Posted
On 9/9/2016 at 9:54 AM, bobm12 said:

Correct, you need to measure the tube (outside diameter) where the crown inserts (case side). You will also measure the clearance where the crown will eventually sit (case side). Finally you will eye ball (with the help of the caliper if you would) the height (thickness?) of the crown or to be more specific, how much would it, once seated in its normal watch wearing position, will it protrude.

Eventually you will find a standard crown (water proof) that will fit the dimensions you come up with plus or minus...not really exact.

Esslinger makes the choice a little easier because of the way their page is structured so that would be a starting point to check on dimensions. Afterwards you can order from your preferred supplier. I would go by the ones without post (fail safe) unless I know the diameter of the post will fit the tube (inner diameter of tube).

Very useful Bob !

The calipers just came in the mail.

The Tube Opening OD is 2.5 mm and the case thickness is 6 mm.

I am closing in on a candidate (below)

The post length is the last point of contention, its not flush and 1mm looks a bit long if I take the picture above into consideration. 

timex.jpg

Posted

That looks like a winner MilTime, let us know how you get on. Remember to add a little Loctite 222 to the threads of the stem...

Cheers,

Bob

Posted
 

 

16 hours ago, bobm12 said:

That looks like a winner MilTime, let us know how you get on. Remember to add a little Loctite 222 to the threads of the stem...

Cheers,

Bob

I will heed those words of wisdom (Loctite 222), thanks ! 

  • Like 1
  • 1 month later...
Posted
On 10/2/2016 at 0:25 AM, bobm12 said:

That looks like a winner MilTime, let us know how you get on. Remember to add a little Loctite 222 to the threads of the stem...

Cheers,

Bob

Bob,

Finally got the crown.

Getting closer but not quite there yet :blink:

The stem and crown mate but not fully :huh:

But the watch movement does work again :woohoo-jumping-smiley-emoticon:

Not quite sure what the next option would be.

The crown doesn't fully insert into the tube, it protrudes significantly when fully inserted.

Now that I have specs, I am wondering if I should try a different crown or all they basically all the same in manufacture ?

Having never done this procedure, I am a bit reluctant to cut the stem with the threading.  

Thoughts ?

DSCN3842.JPGDSCN3843.JPG

Posted
On 10/2/2016 at 0:25 AM, bobm12 said:

That looks like a winner MilTime, let us know how you get on. Remember to add a little Loctite 222 to the threads of the stem...

Cheers,

Bob

Ok...I see there's a bit of "adjusting" to do...

 

 

Posted (edited)

Welcome to learning curve 101,

What I need isn't a short post crown, its a dustproof crown...:wacko:

Back to the calipers and online catalogs...:startle:

83.144WREF__34137.1477075311.500.750.jpg 

 

Edited by MilTimeCan
Posted (edited)
16 minutes ago, Geo said:

Have a read of this, it might help you.

 

Thanks Geo, I need all the help I can get.:huh:

I appear to be at this stage of my watch repair learning curve:

mouse.jpg

Edited by MilTimeCan
  • Like 2
  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • it would be nice to have the exact model of the watch the or a picture so we can see exactly what you're talking about. this is because the definition of Swiss watch could be a variety of things and it be helpful if we could see exactly the watch your dealing with then in professional watch repair at least some professionals they do pre-cleaned watches. In other words the hands and dial come off and the entire movement assembled goes through a cleaning machine sometimes I think a shorter bath perhaps so everything is nice and clean for disassembly makes it easier to look for problems. Then other professionals don't like pre-cleaning because it basically obliterates the scene of the crime. Especially when dealing with vintage watches where you're looking for metal filings and problems that may visually go away with cleaning. Then usually super sticky lubrication isn't really a problem for disassembly and typically shouldn't be a problem on a pallet fork bridge because there shouldn't be any lubrication on the bridge at all as you typically do not oil the pallet fork pivots.  
    • A few things you should find out before you can mske a decision of what to do. As Richard said, what is the crown and all of the crown components made of . Then also the stem .  The crown looks to have a steel washer that retains a gasket. So be careful with what chemicals you use to dissolve any stem adhesives or the use of heat. You might swell or melt the gasket unless you are prepared to change that also . The steel washer maybe reactive to alum. Something I've just used to dissolve a broken screw from a plate. First drilled out the centre of the screw with a 0.5mm carbide . Dipped only the section that held the broken screw in Rustins rust remover. This is 40 % phosphoric acid. 3 days and the screw remains were completely dissolved, no trace of steel in the brass threads. A black puddle left in the solution.
    • I suppose this will add to the confusion I have a roller jewel assortment. It lists out American pocket watches for Elgin 18 size and even 16 size it's a 50. But not all the various companies used 50-50 does seem to be common one company had a 51 and the smallest is 43. American parts are always interesting? Francis Elgin for mainsprings will tell you the thickness of the spring other companies will not even though the spring for the same number could come in a variety of thicknesses. But if we actually had the model number of your watch we would find it probably makes a reference that the roller jewel came in different dimensions. So overlook the parts book we find that? So it appears to be 18 and 16 size would be the same sort of the arson different catalog numbers and as I said we don't have your Mongol know which Log number were supposed to be using. Variety of materials garnered her sapphire single or double but zero mention about diameters. Then in a section of rollers in this case rollers with jewels we do get this down in the notes section Roller specifications but of course zero reference to the jewel size. I was really hoping the roller jewel assortment would give us sizes it doesn't really. But it does show a picture of how one particular roller jewel gauge is used  
    • Seems to still do it through my mobile data, I use an android phone almost exclusively, but I'll double check it. Thanks mark Strange, I'll try my laptop that utilities edge. I've been on site half hour since I got home, it hasn't done it yet. Thanks John
    • At work, I'm on MS Edge, not through chose, on my phone, chrome, no issues with either. 
×
×
  • Create New...