Originally Posted by
tdracer
Agreed - 40 years ago most American manufacturing was transitioning to metric (admittedly gradual - I had a 1978 Buick, to replace one part there were 10 bolts that held it in place, 7 metric (8mm) and 3 English (1/4") - which look almost the same but aren't
.
I've had duplicate tool sets - English and Metric wrenches, sockets, etc.- for 45 years because I needed both. Is that uncommon on the other side of the pond?
I was an RAF technician working on the (Anglo/French) Jaguar aircraft in the 80's; although notionally built as a "metric" aircraft, we needed the full range of imperial sockets/wrenches as well. Exactly the same "
is that 3/8" or 10mm" problem.
In general, technical instructions (ie Mods and SBs) were written in metric terms if originating in France, but were often Imperial if from the UK; "measure 4.3 inches and drill a 1/8 hole".