It's unlikely that your gun was from the forties, at least not the early forties. One of my skeet 20's was shipped in 1948, is pre diamond checkering, and is serial number 14,527. You should get your gun lettered to confirm the date. I didn't know anyone dares to create a date chart for 21s. It can't be done. I suspect the diamond checkering may be original and your gun is actually from the fifties.
Then again maybe the 20 gauges were numbered together. And the other gauges were separate. You two have 20 gauges numbered close together. I have a 12 gauge #19754 that was shipped in 1947. Goes to show you that the numbering system they had at Winchester wasn't the most accurate. (I just thought I'd add to the confusion). Best to get the work sheet and registration if you can with a 21. That's why I said that Pauline Muerrle has records on updates and a lot of records from Winchester if you can't get them from Cody.
