I got stung buying the wrong 4x20 ASI scope years ago. I paid £150 for something worth less than a tenth of that so it happens to everyone. People tend to be embarrassed and hush it away but you don't know what you don't know.
Do you have evidence of these matching serial numbered revolvers or is it hearsay?
I concur on the chamfers. Fascinating and weird.
On the eyepieces are you saying I actually sorted you out? I've no recollection of that and have just been putting some aside as I tidy up my remaining scopes.