KAC 456
The following images are from Leacy MG:
Farenheit, various markets up to October 1968
Centigrade, various markets up to October 1968
C-N-H, used from October 1968 to August 76
V8 60psi used up to June 1974. A 100psi gauge was used briefly after June 1974, possibly the 4-cylinder gauge, although it may have also had the V8 red and white cross-hatching of the H zone.
V8 80psi used used after the 100psi gauge up to the end of production. Note the oil needle is angled up at rest and not horizontal like all the other gauges.
For completeness, the later electric single C---H gauge, used from August 77 on. Presumably the 'N' was dropped in a 'failed' attempt to prevent owners getting paranoid about the quite normal range and variation of 'normal' temperatures.