Hi Mark,
We went to a wedding last Saturday evening at Kelham Island in Sheffield, the museum was opened for wedding guests to look around, in the Ken Hawley Collection are various trade samples on display, one being a very large King Dick spanner.
http://www.hawleytoolcollection.com/
When I first started work I stamped my initials on all of my tools or put on them file marks, none of this supplied tools back in those days, you bought your own or made them.
Regards
Alan