I'm really impressed and thankful. Thank you all for your efforts. Very interesting stuff. I'm glad my gun was not made by a lunatic or imbicille.

Here's the link from the seller:

http://www.cabelas.com/gun-inventory---owatonna---english-sg---1549930-hjsxs-owa.shtml

no photos of the proofs, but they tell me it has been nitro proofed. Chambers are actually 2 1/2, not 2 3/4 as indicated. I like it because it appears to be a good (not "Best") gun in reasonable condition that has not been messed with.