samuel.chassot
12
Avec plaisir ! Thanks for the welcoming message!
Proud new owner of the speedmaster 3861 
Happy SpeedyTuesday!!
The Omega Caliber 321 will always be one of the most iconic chronograph movements in history. The original calibre 321 powered the Speedmaster that passed NASA’s qualification tests in 1965, and also powered the Speedmasters that went to the moon. Truly a...
left of the balance cock@eight oclock-do you know what that small round bar sticking out to the balance edge by the index pins is for or does?
looks like its touching the overcoil on the balance spring before it enters the stud strange! certainly not standard for this calibre
Not too sure what it does
But it is found on both the original 321 as well as the “new” 321. See pics below from the internet. ...
both index pins have them for adjustment.
they are there from what i can see to adjust the witdth between the index pins in relation to the the balance spring-as the spring 'breaths'. just glad mine does not have them and is fully freesprung
The bars sticking out are there to prevent the hair spring to move in case of a shock.
Also, all hair spring, even free-sprung must be adjustable for the "neutral position". The balance must be centered when the pallet fork is removed. This can be heard in the tick-tock too, if this is not well set, the tick-tock are asymmetric (like blues ...
Avec plaisir ! Thanks for the welcoming message!
Proud new owner of the speedmaster 3861
