By Email
JohnJencek@ancient-coins.com


By Mail
John Jencek
205 De Anza Blvd. PMB #119
San Mateo, CA 94402


By Phone
(650) 804-4841

By Appointment
We work by appointment, and can be reached by email or voice-mail. We will try to suit your schedule, and can arrange to see you evenings or weekends.  San Mateo is south of San Francisco, just 30 minutes from San Francisco or 15 minutes from the San Francisco International Airport.