Baikal shotguns are very well made and will stand the test of time.
I was interested to read the following:
Nice strong workhorse of a gun, some nice basic game scene details, wood is not at all bad looking either. I'd keep it for a back up but I need the cabinet space! Barrels measure 25&5/8" Choke is I think 1/2 and full, if I remember correctly although I don't have a choke gauge to confirm.
Baikal over and under barrels of that length are likely to be Skeet choked with true cylinder in the bottom barrel and bell muzzle in the top barrel.
Baikal bore diameters are normal