1st models had a small rectangular ejection port
2nd models had the oval port, the trigger guard was inletted and the rifle was marked 1919 NRA
3rd models had the oval port, trigger guard was not inletted, nor 1919 NRA on the rifle.
These are general rules, as many sub-variants have been encountered, probably due to using left over parts as we also encounter in 99s.
Many people think early 1919s, 22s and 23s have no serial #. It is there on the back edge of the receiver ring.
My NIB 1st model short came with the normal magazine that worked just fine as the dual extractors grabbed the rim much like 98 does (except on both sides of the rim).
Great rifles and in many ways superior to the hallowed Winchester 43. Come to think of it, it's the same with 99s and 88s, 336s and 94s and so on.
