Thermal transmitter fitted in the cylinder head from 1970 on until its demise on the 1990 Coopers this part was the same as GTR143. One number was original fitment and the other supplied as the spare part by Unipart.
Most minis with dual gauges up to 1969 including Cooper S Mk2 that had oil/temp gauges fitted used this type and all when fitted with a voltage stabilizer. Minis before Sept 1964 except some super deluxe and pre–Sept 1964 Cooper without voltage stabilizer used GTR102 with green identification nose. After 1969 use GTR101. Another guide is that the gauge for…