Hey, so I have a question. I've got an Invicta dive watch with a NH35A movement here that whenever I unthread the stem and crown as it is unthreading the date starts changing. Once its unthreaded I can change it to the 1, 2 and 3 positions and set and wind it accordingly. How can I fix this and what is causing this?
Yours truly, Josh
Question for those who work on Vintage Timex watches:
I've restored several Timex pieces from the late '60s to the late '70s. The technique I learned (from Internet posts and tutorials) say to simply loosen the dial-side balance pivot by unscrewing it 1/2 turn prior to cleaning the entire movement in an ultrasonic cleaner. This method contradicts the official Timex service manuals, which state that the balance should be removed, cleaned separately and reinstalled. Thus preventing the hairspring form being damaged in the ultrasonic cleaner.
My experience is this:
Leaving the balance in place (slightly loosened) is much easier and will work on the standard movements used in the '70s (M24/25, M32/33, M104, etc.) Attempting the same method on movements from the '50s and '60s (M22, M29, etc) will result in a kinked hairspring that is damn near impossible to un-kink. So my question is this:
What do you experienced Timex restoration experts recommend? Leave the balance/hairspring in the movement for cleaning, or take it out to soak in a separate jar?
Is the potential for hairspring damage greater when removing/reinstalling the balance - in comparison to leaving it in place?
I've messed up a couple of vintage movements that I really wish I hadn't. I don't want to make those mistakes again.
Thanks for any insights!
Vostok 2409 Service Walkthrough Disassembly Pictures (Please sort by name in ascending order)
Vostok 2409 Service Walkthrough Assembly Pictures (Please sort by name in ascending order)
Being able to service the ETA calibre 2824-2 was a long-term goal and a dream when I started servicing and repairing watches some years ago. However, my first “calibre love” was the Vostok 2409; a reliable Soviet/Russian 17 jewels manual workhorse without any complications which has been around since 1970. It is still in production and found in Vostok’s Komandirskie series of watches, by some called the AK-47s of the watch world, together with its bigger brother the Vostok Amphibian dive watch.
Modern-day Vostok Amphibians use the automatic Vostok 2415 (w/o date complication) and 2416 (with date complication) calibres, but the Amphibian that I’m servicing in this walkthrough, an Albatross Radio Room, popular among collectors, is from the 1980s and in those days the manual 2409, as well as its predecessor 2209, was commonly used in the Amphibians as well as the Komandirskies.
While I was servicing this watch, I noticed that the crystal didn’t fit perfectly in the watch case. Being a serious dive watch originally designed for the Soviet navy this was, of course, unacceptable, so I replaced the crystal and video recorded the event in my “Bergeon No 5500 Crystal Press Review”.
For me, the 2409 was a great movement to get started with as it probably is the most affordable movement on the planet, and spare parts are readily available and cost next to nothing. A lost or damaged part never spells financial disaster. Also, eBay offers an abundance of used Vostok watches in decent condition housing this movement for as little as $20 and sometimes less. A brand new Vostok 2409 (www.meranom.com) can be had for as little as $27. Be aware that, almost without exception, the eBay listings always state that these Vostok watches have been serviced, but in my experience they never are. Well, maybe dipped in a can of naphtha, left to dry and then injected with a bit of oil here and there. I’ve seen horrible examples!
A somewhat tricky bit about the 2409 is to remove and replace the anti-shock springs. For this, I use a self-made tool made from peg wood. It’s shown in one of the assembly pictures together with a description of how I made it. A very similar tool is demonstrated in this video.
Later, as I was working myself through Mark Lovick’s watchrepairlessons.com courses, I trained with the Unitas 6498 pocket watch movement which is the selected movement for the courses. In all honesty, from a learning point, the Unitas 6498 would have been an easier movement to get started with (especially the anti-shock springs), but the tinkering with the Vostok 2409 was a low-cost and fun way to get started and made me better prepared for the courses which answered a bunch of questions and was amazingly instructive.
Eventually, I plan to publish a “Vostok 2414 Service Walkthrough”. The 2414 is identical to the 2409 but adds a very uncomplicated date complication.
So, if you want a whole lot of fun for next to nothing when it comes to money, there is no other movement I would recommend before the Vostok 24XX movements, and the 2409 is a great starting point if you have a desire to begin tinkering with watches. Be warned though; tinkering may take over a substantial chunk of your life!
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