Thanks Parabola.
The original image is high resolution and I tried to enhance it a bit
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/Gun-Stuff/Sleevinglining/i-cS3WJ6L/0/MTVFG4tDgDp84PSwk4mGZ3W3c7Npxkmhp3rMm3m8F/X2/006-A0409-Enhanced-NR-3-X2.jpg)
That would be quite the sleeve joint!
i had assumed the sleeve joint was a bit farther out - because there is a slight amount of the 13/1 stamp that appears to be sliced through - that notion supported my thought the proofs were original.
a photo of the top side of the sleeved joint area would be useful - and could also show the rib extension (if there is one). i know there are high-end sleeves that are virtually invisible, but from here in the cheap seats, i have never handled a gun that met that standard.
best regards,
tom