In my opinion, the answers to your questions are: #1 - Maybe; question #2 - No. As FYI, frames were numbered in sequence; but they were not necessarily built and shipped in sequence, this is especially true of higher grades that were generally special order items. Although I have not seen a shipping ledger page from 1913; I do have a copy of an example from 1895. On that page (all ejector guns) there are several examples showing shipping dates as much as 3 years apart.