It's an reused serial number then. Evidently, Winchester, like everyone else, scrapped receivers, but not actual serial numbers in some cases. Those serial numbers were used later in production, so it's possible to have a 1 million number that was made in the 44 to 45 range. I saw one like that on GunBroker recently. However, I couldn't tell if it was a cobbled together one or an original reused number.
