I have a Ithaca Flues in 20 ga serial number 368797 i believe mfg in 1923. I need an education on some of the measurements and markings on the barrel.
I measured bore diameter and right was .615 and left .610. Would it be common to have different bore diameters on the same gun? I have an Ithaca chart that indicates bore diameter for 20ga should be .615.
There are markings and numbers on the barrel I don't understand. Stamped on both barrels is (for what I can make out) 'SB8C9TB' . Right barrel table marked 2 and left marked 4 Rear lug marked 8 and front lug marked '1' with ' …….er Proved'. I don't understand any of this. If someone can interpret that would be great. Thank you.
