The Incabloc end stones are oiled and re-fitted to the blocs.

UK watchmaker showing service of Omega Speedmaster - oiling of Incabloc shock protection

The balance/cock is now fitted.  The fine adjustment regulator is centralised.

UK watchmaker showing service of Omega Speedmaster - review and adjustment of balance and hairspring

I noted in the initial review that the hairspring was not concentric.  Additionally, it’s clear that the outer coil is closer to the other coils on the lower right (at the stud) than on the lower left so it’s significantly out of shape.

UK watchmaker showing service of Omega Speedmaster - review of hairspring shape

The hairspring should be central between the regulator pins and it may be seen to be hard against the inner pin due to the outer coil shape.

UK watchmaker showing service of Omega Speedmaster - review of hairspring

The hairspring is  checked to ensure it’s flat and parallel to the mainplate which, in this case, it is.

UK watchmaker showing service of Omega Speedmaster - review of hairspring flatness

Adjustments are made to return the hairspring to the correct shape and final small tweaks are made when the basic movement is complete.  This leads to the final shape as below where the outer coil is now running centrally to the regulator across its working length and the coils are equally spaced.

UK watchmaker showing service of Omega Speedmaster - final hairspring shape

The balance and cock are removed and the assembly continues with the mainspring barrel.