M & M Jewelers

M & M Jewelers is a jewelry store on 3rd Avenue in Chula Vista that keeps a watchmaker on staff, putting it in the full-service and overhaul category rather than just battery swaps. Alongside jewelry repair and eyeglass frame repair, watch repair is listed as one of its core services, and work can be arranged through the shop's own site as well as in person.

The shop says it has over 50 years in the jewelry industry, specializing in sales, repairs, and custom work, though the exact split of in-house versus sent-out watch repair isn't detailed on the site. No specific watch brands, service prices, or turnaround times are published, so anyone bringing in a mechanical or quartz watch for a full service should call ahead to confirm what the watchmaker can handle and get a quote.

Payment is flexible: the shop accepts Cash App, Apple Pay, Google Pay, and the major card networks (Visa, Mastercard, Amex, Discover, JCB), which is useful to know if you're paying for a repair on pickup.

It's open six days a week, Monday through Saturday, with no Sunday hours, giving a reasonably wide window for dropping off or picking up a watch during the work week or on a Saturday morning or afternoon.