I may have an opportunity to acquire a commercial HSc that fits the description of a "Swiss" variant as described in the Burnham / Theodore book (page 38). It does have the correct finger extension magazine, but no spare or no presentation box. SN looks to be in the correct range, and finish matches the description. I know determining a value is impossible without inspection, but I'm looking for a value relative to a equivalent condition and vintage commercial HSc. Is it 1.5x, 2x, 2.5x, etc. Thanks, trying to zero in on a fair offer.