"Old Knives"

Levine calls them 3 1/8 inches; I am curious if they were slightly different than that, if they were built by millimeters, as they were made in Europe?
When did Europe/Germany adopt the metric system?
I know Brittan used the Whitworth and inch measurements into the 20th century.
(My 1965 Triumph T100C motorcycle had both inch and Whitworth fasteners, as did a friend's Norton 850 Commando.)
 
Last edited:
Back
Top