Stubs P5 3 1/2"

B&S Mfg. Co. 3 1/2" Providence Rhode Island USA 811

unmarked 2 1/2"

C.P. Co. 2 1/2", Greenfield, Mass, USA

L.S. Starrett Co., 3", Athol, Mass, USA

Straight Calipers unmarked 5"