The old 'rule of thumb' about barrels touching isn't a 'final rule', as I have seen many guns that have been cut 2", and the barrels are still touching.
I have seen barrels which are clearly uncut by the physical appearance of the termination line, and yet they do not measure "exactly" what either the letter, or serialization book says they are. I guess I'd have to say that 1/8" is perhaps the most I've seen, but generally, a sixteenth or even 3/32" is not at all out of the ordinary.
Your barrels do, indeed, look trimmed. That said, I doubt it will have additional negative impact on value than the fact the chokes are opened. Likewise, a very good faux painting of a lengthened stock will have less of an impact than a pad added to a cut stock.
This all, of course, is just my opinion and may only be worth what it cost you.
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