Originally Posted by
cj241101
Ref:- 3M Co Gulfstream 2's. N23M, N33M etc. These were regular in the UK for many years. I have a vague recollection that they used the callsign "Mining" followed by the first number of the registration i.e. Mining 2, Mining 3 etc. Anyone confirm (or otherwise). MTIA.
Yes, that's correct. 3M started out as the Minnesota Mining and Manufacturing Company.