58
Pounds, shillings, and pence
(www.royalmintmuseum.org.uk)
Post inspired by this recent comment about how useful 120 is (or 240 in this case), because its can be evenly divided so many ways: https://sh.itjust.works/post/40842670/19379837
Source: https://www.royalmintmuseum.org.uk/journal/history/pounds-shillings-and-pence/
IIRC several of the like top 5 schools of math are french so that checks out.