Had a pair of 12 bore barrels in last week for a strip and relay . They had been sleeved in 1977 ,I do not know who did the work but the numbers "3" & "35" were stamped on the flats. Unfourtunatly I was unable to get a photo as my customer wanted them back ASAP to get them blacked as he hopes to shoot it in the early new year. The style of the stamps appeared very close to those on the Henry.