Few watches are as quietly iconic as the Rolex Explorer 1. This reference 6610 came to our Seattle workshop wearing its history honestly — a patinated black dial with gilt 3, 6, and 9 — for a full service. The agreed work: a new crown and crown tube, a new high-grade crystal, and whatever the movement needed once we were inside.

The Explorer 1 dial as received — "OFFICIALLY CERTIFIED CHRONOMETER," with aged gilt markers.

Inside the movement

We uncased the movement and broke it down for cleaning. Fully disassembled, the diagnosis came into focus: it needed a new mainspring, and the winding system would need attention.

The automatic movement in the case — "ROLEX PERPETUAL" — before teardown.

A mainspring beyond saving

The original mainspring was bent and could not be reused. There's no shortcut here — a tired or distorted mainspring robs a watch of power reserve and consistent timekeeping — so we ordered a new one.

The original mainspring, distorted and unfit to reuse.

The barrel reassembled with a fresh mainspring.

Winding, set right

The base movement ran well, but the winding showed wear and the automatic mechanism needed a new spring clip. Fitting a replacement crown wheel resolved both the manual and automatic winding concerns.

Case service

Case work brought its own small drama: the old crown tube failed on removal and had to be broached out before a new tube could be installed. A worn oscillating-weight axle bolt — the rotor was still rubbing — was replaced. The luminous paint on the hands was stabilized, and the dial and hands refitted.

The cleaned case with its new crown tube fitted.

Pressure-tested and regulated

Finally, the case was pressure-tested and the movement regulated. It passed QC at +11 seconds per day with a 46-hour power reserve, then went home.

The finished Explorer 1 on the timing machine, running cleanly.

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 Rolex in need of service, start an intake and tell us about it.