Mutual Optics Inc 717 S Brea Canyon Rd #5, Walnut, CA 91789, United States of America +1 909-594-3849 http://www.mutualopticsinc.com/ Friday 9 am to 5 pm Saturday Closed Sunday Closed Monday 9 am to 5 pm Tuesday 9 am to 5 pm Wednesday 9 am to 5 pm Thursday 9 am to 5 pm Reviews Map