'72 Meter Digit Colors

All H2's to approx VIN 18,300 had the Olive Green digits, they then went to Torquoise (?) digits and then on to Blue around 21,000 - H1b and S2 also had the same changes to the colours in the same manufacturing period.  - Rick Brett

H2 meters have angled drive, H1 drive is straight.

Green, Turquoise, Blue below (click pic for full size):

S1/S2 KPH Meters