The Steel Rule
18:23
Verniers
17:17
No 6207 A Study in Steel 1935
26:44
Colchester Lathe Company
11:59
Fundamentals Of Filing (1942)
16:25
Robertson, Phillips, and the History of the Screwdriver
19:55
Was this the most dangerous job in history?
27:48
A Story Of Lead (1948)
22:29