Longines 5-star Admiral (cal 508)

[LittleWatchShop]

I serviced this the other day. The really cool thing I discovered is that I found my Dad's mark from servicing it in 1981. 

I got the watch from my sister-in-law.  Her Dad and mine were friends, so it is not too surprising to find that he serviced it. 

The crystal arrived yesterday: GS DT 305.  I think it needs a 306 because it went in too easily.

The picture shown of the movement is with the oscillator weight removed.

Here is the info on this movement.

[Nucejoe]

Question; 

I have a Longine admiral with calib 508 movement , just assumed 508  to be a Chrono grade movement !      is it? 

 

 

[LittleWatchShop]

21 minutes ago, Nucejoe said:

Question; 

I have a Longine admiral with calib 508 movement , just assumed 508  to be a Chrono grade movement !      is it? 

 

 

I do not believe so.  However, answering a question like that is a little above my pay grade.  It is stamped unadjusted, so that is my guidance.  I just serviced an ETA 2824 stamped "adjusted in 3 positions" leading me to believe that it is chrono grade.  The 508 runs solid in all positions.

[Nucejoe]

Some imports to US was purposely stamped unadjusted to avoid customs charges for higher grades, I bought my Longines  in the US  too. I bet your watch is a Chronograde. 

Various grades of ETA are made, depending on the brand, I think an eta that goes in Tudor is  Chronograde. 

Rolex puts ETA 7750 in thier Cosmograph wathces, I guess. 

Regs

[Angrybear]

That’s a great story finding your dads mark. Multi-generational watch servicing, how lovely! 

[watchweasol]

Great  like Father like Son  continuity in its history (worth as much as the watch)  

[Jansh]

My 508 only has an amplitude of about 190 after cleaning and oiling. All play is good. What could this be?

[Nucejoe]

@Jansh 

Did you replace the mainspring? 

Did you hand or machine cleaned? Sometimes dirty pinion leaves go unnoticed. 

Fault in escapement,  any or combination of the following,

-heavy pallet lock on escape teeth or damage therein, - bent pivots, dirty jewels in balance setting ,,,etc . Actually most poor condition in escapement ,  fault in hairspring coil problems  , dirt ,  rubbing parts. 

 

Edited 2 hours ago by Nucejoe

[mikepilk]

On 11/28/2021 at 7:48 PM, Nucejoe said:

I have a Longine admiral with calib 508 movement , just assumed 508  to be a Chrono grade movement !   

I haven't seen that written, though most of these larger Longines from this period are probably chrono grade. I have a 1975 Admiral Cal 506. According to Ranfft the 508 is the same but with Day

 

Edited 3 hours ago by mikepilk

[Nucejoe]

 Usually engraved on movements is the number of positions its adjusted in. I remember nickelsiver said some importers didn't want such engraving to evade extra charges levied on pricy pieces.

I bought mine while in the USA, curious to see if it mentions No of adjusts or not. 

As precise it keeps time though,  must have multiple  adjusts and a chronobrade. 

Regs