May sound crazy/// But I have been thinking about this for years.. I still have some parts for repairs in stock Not for sale.. But have always been meaning to count the teeth and check sizing of the same bit that is on a simple 7750.. It would not suprise me if it was a fit.. well it would as i bet the size maybe better that the tooth count.. But have always wanted to check this. If you have a 7750 and check this part out please inform us.
Thanks
peter

: Hi, 1) I have a project watch, a Breitling Chrono-Matic caliber 11
: - there is a defective part 8086, aka "oscillating
: pinion" - part 8086 from my cal.11 is bi-metallic ie. it is
: made of brass and steel, and hence it wears off quicker I
: understand - is de oscillating pinion from a cal.11-1, which is
: made entirely of steel, interchangeable with that from a cal.11?
: 2) any idea where I can source the oscillating pinion - hope
: someone can assist me on this - thank u - Edwin