I bought my CM about 10 yrs. ago at the Dallas gun show and I too would like knowing which version my CM is. The ejector port is beveled on the left, also the left slide is stamped DETONICS .45 and has COMBAT MASTER stamped in smaller lettering below it. Stamped on the right frame just above the trigger guard in very small capital lettering is: DETONICS 45,SEATTLE, WA., followed by the serial number (CR164118). It also has an adjustable (via Allen wrench) rear sight. Also, are there any reputable Detonics experienced gunsmiths in the Dallas area?