Greetings from new member and long time lurker! Great site and have always been able to answer my questions thru searches. Have acquired a Mama Bear with following stamped at left rear upper corner: 'DBM' and just below that '1101'. This has over-stamped the number '2001'. Draft knobs are alum 4 vane and door handle is single 90, close spiral stainless. Has been in a home in Wytheville, Va since new. So, with this info can anyone help with identifying probable year, mfg location, and sequence ? Many Thanks !