I found this at the weekend for a few dollars. A clean and polish and it came up looking lovely. All working and keeping great time. Stunning lugs and dial. It got me researching this maker. Never had a Benrus before so a sharp learning curve. Can’t seem to find much info on this model. I’m thinking circa 1956/7? Serial number 416437. Would it have had radium or tritium lume?

Any thoughts from fellow forum members.