Herbert pendulum hardness tester, made by Spriggs
Brinall Hardness Testing Machine
1918
A portable Brinell hardness tester
Shore Scherascope (portable hardness tester)
1913
Vickers diamond hardness tester by Vickers-Armstrongs
A portable Brinell hardness tester
Brinell type hardness tester with weights for 500 and 3
1921
Rockwell Hardness Tester, c. 1930
1930
Pendulum hardness tester, British Rail
1905-1910
Herbert pendulum hardness tester, c. 1925
1925
Rockwell Hardness Tester, c. 1930
1930
Portable Rockwell hardness tester, British Rail Engineering Ltd
Shore Scherascope (portable hardness tester)
1913
Poldi harness tester, British Rail Materials Engineering Group
1935