Watch Service Concierge: Curated Watch Service Providers, By Brand

A curated directory of watch service providers, organized by brand. Every listing is researched before it's published, so you can find someone who knows your Rolex, your Patek or your Omega.

Post-Impressionist painting of a bearded watchmaker with a loupe servicing a watch movement at a sunlit window bench

Cornerstone Service Center

Name: Cornerstone Service Center
Telephone: (847) 791-2376

Gurnee, Illinois independent watchmaker Wesley Grau, a Certified Master Watchmaker, servicing 20th century watches by mail, with consultations by appointment.

Multi-Brand / Generalist Vintage (pre-1980)

independent

AWCI CMW21

Verified Oct 16, 2026

Gurnee, IL 60031 (847) 791-2376 cornerstoneservice@outlook.com

Cornerstone Service Center is the one-person practice of Wesley Grau in Gurnee, Illinois. Wesley holds the AWCI's Certified Master Watchmaker (CMW21) and Certified Master Electronic Watchmaker (CMEW) credentials, first earning the master title in 1983, and is a Member of the British Horological Institute (MBHI).

Servicing your watch here. Wesley does all the work at his own bench: watch and clock service and restoration, mechanical, electronic and quartz. He works on brands that support independent watchmakers with parts, and his specialty is the 20th century watches he serviced throughout his career in after-sales service. He also offers horological training and consulting.

Visiting. Cornerstone works mainly by mail. Call or email before sending anything; Wesley will confirm the work and give you the shipping address. In-person consultations are by appointment. (847) 791-2376, cornerstoneservice@outlook.com.

in-house — all work on site

nationwide (mail-in)