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[Proofed]

The only other explanation I've heard is that it could have been in another manufacturers possession as an example of the competition's work for reference and operation.
It is another thing not substantiated by facts in any direction.

As far as Simpson Ltd. Goes, I have bought several pistols and accs. from them and are very happy with them and would not hesitate to do business with them in the future. They have simply presented a pistol for sale and made no claims, that couldn't be proved anyway.