Precision Watch & Jewelry has repaired and restored timepieces in San Diego's College Area since December 1994, when owner Sam Leung Yung opened the shop at 6165 El Cajon Boulevard, Suite B, in the 92115 ZIP. The business holds certified Omega watch repair specialist status, a factory-level authorization that requires proprietary tooling and parts access for the full Omega caliber range. Precious-metal appraisals at the bench feed into the same secondary market served by Gold Refinery of San Diego on Mission Gorge Road in Grantville, where sellers move estate gold and silver after receiving a Precision Watch valuation. Repair services extend across the Swiss and Japanese mechanical spectrum — Rolex crown-and-tube replacements, Tag Heuer gasket reseals, Tissot Powermatic 80 movement overhauls, IWC chronograph calibrations, and Seiko NH35 module swaps all move through the El Cajon Blvd workbench. The retail case displays new and pre-owned pieces from Movado, Citizen, Longines, Rado, Fossil, and Swiss Army, alongside a jewelry counter that handles chain soldering, ring sizing, clasp repair, and stone resetting in gold and platinum settings. The shop sits near SDSU in the College Avenue Vons shopping center at the intersection of El Cajon Blvd and 62nd Street, drawing walk-in battery replacements from the campus workforce and surrounding College Area residential blocks. Clock repair — grandfather, mantel, wall, and cuckoo movements — rounds out the service menu, with house calls available countywide for pieces too large or fragile to transport. Homeowners who insure appraised jewelry through local carriers such as Pappazi Insurance Agency in San Carlos often return for updated valuations when policy renewals require current replacement figures. The Better Business Bureau has maintained an A+ file on the business since February 1996, covering three decades of continuous operation from the same El Cajon Boulevard suite.