Norm and J Randol, I stand corrected---if it is s/n 214493 it could be a 10, 12, or 16 ga. and not a 20, assuming that it has ejectors. However, it is a 1912 gun (from Brophy's book. Don't rely on the LCSCA serial number recap---- it is at best confusing.
In any event, it was still a steal.