Wow, certainly appreciate the expert opinions and insights of the aficionados on this list! I have not measured the chokes but have a gauge on order and will post after doing so. Will also get some additional pictures.

Seems that most of the 9 shotguns identified so far were from the second half of his production. I wonder why earlier shotguns (other than s/n 17) have not been seen?

Mr. Petrov, what do the water tables on s/n 274 look like?