Or it could have been recorded as a No.2 deliberately; we don't know but there does appear to be evidence that some guns were purposely recorded as a lower grade, perhaps to give a friend, employee, relative, who knows a better price. At any rate, in my opinion the grade recorded in the ledger is the grade designation that must be used regardless of what may be on the gun. Below is a pic of a Smith gun that is graded stamped A-1 on the frame and recorded as such in the shipping ledgers. Clearly this gun is a much higher grade than an A-1; so your guess is as good as mine as to why it is an A-1. Bottom line, we simply can't explain some of the things we see a century or more after the fact.