Originally Posted by Vol423
Here is the photo of the proofs. Unfortunately upside down but I didn't want to wait 4000 seconds to repost

https://imgur.com/gallery/WsJWhDu

In viewing the proof marks on the barrel flat photo you supplied, I see the Birmingham viewers mark with the letter "E" on the left of the crossed sceptres indicating that this gun was re-proofed in the year 1954. There are other marks associated with this re-proof such as 2 1/2" and the 12 inside the angle pointed square. The 2 1/2 inch and the 1 1/8 oz marks leads me to believe the gun was reproofed early in 1954.