A vintage Rolex Oyster Chronographe — a "Pre-Daytona," the lineage that led to the watch everyone knows — arrived at our Seattle workshop for a full restoration. Its dial reads "ROLEX / OYSTER CHRONOGRAPHE / ANTI-MAGNETIC," and beneath it sits the legendary hand-wound Valjoux 72.

As received — the Rolex Oyster Chronographe before service.

Opening it up

With the caseback off, the chronograph movement showed its age — a column wheel and chronograph bridges under years of tired oil and grime. We sourced replacement parts as the project went: a new crystal and crown tube first, then the crown, with new pushers to follow.

The chronograph movement as received, before teardown and cleaning.

Servicing the escapement

During inspection we removed the old shellac from the pallet fork and applied fresh shellac to reset the pallet stones — routine but exacting work at the heart of the escapement.

The pallet fork, its ruby stones reset in fresh shellac.

The fault hiding under the microscope

On reassembly, the balance wasn't delivering the amplitude it should. The cause only revealed itself under the microscope: corrosion on a balance pivot. We burnished the pivot to try to correct it — but burnishing exposed a deeper pocket of corrosion, so we ordered a new balance staff, re-staffed the balance, then poised and tested it.

Under magnification: the corroded balance pivot (arrowed) behind the amplitude problem.

The balance disassembled — wheel, hairspring, and cap — for re-staffing and poising.

Case, pushers, and QC

We performed case work and reshaped the bezel, then refinished the case. New pushers — specific to the Valjoux 72's narrow activating levers — and a new crown tube were fitted and adjusted to length. The chronograph then passed timing, power-reserve, and chronograph-function testing, cleared QC, and was made ready to return.

The finished Rolex Oyster Chronographe, restored and running.

This is the kind of work we do every day: complete, documented vintage watch restoration on mechanical watches and Accutrons of every make. If you have a vintage chronograph in need of service, start an intake and tell us about it.