Spanner sizes for a 1928 Austin Seven

[Bob Culver]

A schoolmate's father was a duor Pom tradesman. He reckoned the only virtue of NF was that the nuts could be easily split off with a chisel. I found an early 1900s English library book about lathes.The author reckoned the advantage of the American raised V lathe bed was that workers did not sit on it....
NF is mostly distinguishable from BSF but metric is very similar, esp 8mm;5/16. NF is fine for quality as in aircraft but too fine for rough use.