My 100-6 came with the correct style speedo that reads 1020 on the faceplate. I sent it to Mo MA for refurb but the speed reads way high. I called Mo Ma and she sent me a calibration test of cable to wheel turns which came out with a value of 1600. She said she didn't have any records of speedos having calibrations that high but APT Electronics said 1600 was common for Smiths gauges. Either way, I guess I need to get mine regeared or find a correct gauge. Anyone know if this 1600 is Ok for a 1959 100-6? It runs and accelerates good but I do not have the overdrive installed in it which I wouldn't think affects the speedo calibration. Any ideas? Anyone know where to get it regeared if I need to?