Spied this one in a shop. DWM serial 4032b (commercial style numbering) with no date or stock lug. Imperial mark on left side of barrel, receiver (also 2 proofs), and toggle. Unit marked 107.R.3.1. and had the hold open. Condition was probably 80%+ matching but wood bottomed clip (numbered 3002 with large numbers lengthwise, not across). They were asking $850. Jan, what is the history on this unit?