New parts arrived today and once fitted the problem persisted ?!? So with my sherlock holmes hat on i went by the numbers through everything i could think of that COULD cause the mainspring to jar with the intermediate wheel ( not center wheel as previously stated ). It's funny because it is nearly always the smallest thing that stomps me and this time it was no exception, the cause......the click spring screw. I never really saw or paid attention to it whilst stripping the watch as it looked correct, however i foolishly took for granted the last person to service the watch would have assembled it correctly. The damage to the old mainspring barrel was not from poor mesh or debris but an over long screw tip knocking the barrel teeth.
With the problem now known i have replaced the screw with one more suited and the drivetrain was now free again to move as it should. Funny to think that such a small deviation could mask itself as so many possible errors. The original balance is now super clean and functioning exactly as it should ( at long last ), so i can now keep the new balance as a future spare.
The watch had come to me in a really poor condition with badly damaged casing , scratched glass, damaged strap, and a rusted movement with gremlins running rampant. I am pleased to say after much tlc and patience she now runs super smooth with fairly good looks for her age i think :) Of course you lot just love your pictures so here you go.....
Omega 1968 - Gold plated De Ville Automatic - Caliber 1002 - New Lizard strap :)
She still has some scars but far better than what she started as :)