I have a gauge which IIRC Peter Horton identified as off a 750 which I bought thinking it was off a 550F2 as the face is blue. Numbers up to 140 then 2 lines, trip meter on back, angled drive, quite a long one as well. 2 bulbs. Has a small printed sign on the base which says 057100-5721, 2240 rev = 1 mile. It's a ND gauge.
Any use?