Thanks fellas. I believe Ithaca tubes had such a stamp.(looks like Drew answer a few seconds earlier)
1892 - "Sanderson Brothers Steel Company, Syracuse, Onondaga, Established in 1876; 11 heating furnaces, 3 forge fires, 2 annealing furnaces, 2 steel cementing furnaces, 10 hammers, 3 trains of rolls, (9,10, and 12-inch,) and one 30-pot and for 12-pot crucible steel-melting furnaces; product, hammered and rolled crucible steel of every description, shear steel, and blister steel; specialty, the finest quality of tool steel; annual capacity, 5,000 net tons. Brand, “Sanderson Bros. & Co.” C.H. Halcomb, President and Treasurer; W.F. Belknap, Secretary." Notice who the Secretary is/was????
Somne time prior to 1908, Sanderson Brothers Steel Company had been absorbed by the Crucible Steel Company of America, Pittsburg. Many of the names/stamps are really for a type of steel/brand with a certain percentage of elements at a specific point in time.
I'd guess the "P" to be for Pittsburg as Sanderson Brothers(Syrause) may have had a patented process that Crucible used in its Pittsburg facility.
Kind Regards,
Raimey
rse
