I have this Columbian vise. Side says 603 (jaws are 3”). Inside base it has 603 2. Under swivel base it has 606 3 and the “M”. Any ideas on a time frame of production is appreciated


I have this Columbian vise. Side says 603 (jaws are 3”). Inside base it has 603 2. Under swivel base it has 606 3 and the “M”. Any ideas on a time frame of production is appreciated