2 large old 1800s steam engine/locomotive pipe tongs, Ashcroft Mfg w/arm & hammer hallmark

Lot of two pair of large, steam engine vintage, pipe tongs (an early design of pipe wrench), originally patented in the 1870s. The large pair of tongs measure about 25 inches long and the smaller pair are 20 inches long. The 20 inch pair are marked number "2", "Ashcroft - NWY" and are hallmarked with a workman's arm and hammer emblem. We were told that larger pair are also made by Ashcroft, but we didn't see the mark and so are not sure.