Jaeger-LeCoultre

Any guess on what this piece is?=D (Hint: it is a Yaeger) ...  

Try again...hint 2: gyrolab balance wheel

Should be snooze time over there. My GMT is not with me so I estimated with my duometre (brain).

Have a great day!

Heeheeheee... ...  

Yes it is the calibre 770. It appears so spartan, so basic, yet is has so much packed in it. It is relatively thin too. I found the deadbeat seconds a very useful function to time things to the exact second. How I wish they expanded on this series. Thanks... 

I pray you find one in good condition, with a trustworthy seller, and hardly worn. But then again, the calibre can be seen through the open back, and it will be almost impossible to mask a fake at this level of complexity. Beware of online scams my friend... 

...