It's a myth why this one captured bidders' attention. S/42 in general is a ..... well, at least very hard to be classified as a rare variation, there are many of them in various levels of shapes floating on the market. How did people's "falcon" eyes falling on this one (neural word) is unclear..... Good for seller though.
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Comparing with this one:
http://gunbroker.com/Auction/ViewIte...Item=121899136
The seller is knowledgable and honest. "Shooter" is accurate technically, but that does not help selling.