Evening all, can anybody work out the rough age/cal of this Longines auto ultra chron? I don’t have the specific tool needed to get the back off. TIA.

 

Caliber is a 431, from the late 60’s or early 70’s.

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Longines_431

 

Going by dial and fonts, early 70s

See here https://omegaforums.net/threads/longines-vintage-catalogs.19824/

 

I would like to get access to the movement so that I know exactly what I've got. I think this may be a front loader, but not sure. Is anybody able to tell from the photos provided?

 

Front loader. The are no indentations (wrong term, I know) for use of a case back opener.

 

you get into this watch by removing the crown first . There is a special way to remove the crown then lift the watch movement from the case

 

Interesting, it has Admiral like hands...

 

Once you do, you can email Longines’s heritage department and they’ll send you a summary of when the watch was produced and where it was delivered to, free of charge.

 

here is mine but in 18k gold

 

Just bought one myself, and love it.

 

Mine says hi!

 

you frist remove the crystal then you will see how to unlock the crown and lift it up

 

first polish in 45 years
not the best job and i used only cape cod but the gold shine is there

 

You polished it! Argh there goes 90% of the value!!!!

Only joking, looks good.