An O Grade SAC with 4-digit serial number indicates that you have the lowest grade Syracuse gun offered at the time. The O Grade Syracuse was a stock gun built to standard dimensions/specifications and both barrels were bored full/full unless otherwise requested. It is unlikely that triggers would have been modified for a southpaw on this grade gun; but the customer could have certainly specified his choking. We may never know the reason for the reverse choking; but I strongly suspect that the vast majority of period left-handed double gun shooters used whatever double trigger set-up came with their gun off the hardware store shelf.
