SMITHS LOTUS TYPE DUAL OIL AND WATER GAUGE DEG C 070.029. SMITHS CLASSIC OIL PRESSURE WATER TEMPERATURE DEG F 070.129. SMITHS CLASSIC TRIUMPH TR2-3A WATER TEMPERATURE GAUGE F - 52MM. Can be fitted by carefully prising back the tabs to remove the existing rim, then fitting the new rim and squeezing the tabs in to secure it.
eBay