Seregin's Fine Timepieces

Seregin's Fine Timepieces is an independent watchmaker's shop tucked into the lobby of 325 Mason St in the Tenderloin, with an on-site watchmaker handling the work rather than sending pieces out.

The shop services Rolex, Omega, Tudor, TAG Heuer, Breitling, Cartier and Seiko, covering everything from a simple battery swap to full overhauls, crystal replacement, case and bracelet polishing, bracelet sizing and pressure testing for water resistance. Vintage repair is also offered, which matters if you've got an older piece that needs parts sourced or hand-fit rather than a cartridge swap.

Full service starts at $300 and typically takes three to four weeks, so this isn't a same-day battery counter — plan ahead if your watch is your daily wearer. The shop says it is an authorized service center for Rolex, Omega, Tudor, TAG Heuer, Breitling and Cartier, though that status is the shop's own claim and worth confirming directly if it matters for your warranty. The watchmaker holds AWCI and WOSTEP certifications, two of the more recognized credentials in the trade.

Hours are limited: open Monday through Friday from 10am to 3pm, closed weekends. Given the short weekday window, calling ahead at (415) 397-4536 before making the trip into the Tenderloin is a reasonable move.