Side-by-sides with 2" chambers have been a popular topic on this forum.
I just happened to see one on the Hallowell web site. It appears to have been made by Skimin & Wood and imported to the US by Kimball Arms of Woburn MA. It weighs 5 lb 3 oz and has 28" barrels.
Readers may want to have a look.
It is a nice gun, if the barrels and chambers are still okay, and they probably are. Price is not bad.
I also have a Kimball. Apparently, they are quite common on the east coast where Kimball was importing them from S&W. At least, that is what Morris Baker told me a couple years ago. 5# 3 oz is exceptionally light, even for a straight grip. Mine has a PoW grip and is a bit on the chunky side at 5# 9 oz but a great little grouse gun, it is.
Anyone can own and shoot a subgage gun. The 2" 12 is a lot of fun for folks that like something a bit off the beaten track rather than marching with the masses, and hunting FOR the shotgun is just as fun as hunting WITH the shotgun.
I believe Ned Roberts was associated with the Kimball Arms outfit.