520-15:
3 3/4" white dial shift light tacho, “touch-set” calibration

520-16:
3 3/4" white dial tacho, 0–8000 RPM

523-18:
3 3/4" black dial shift light tacho, 0–8000 RPM
Also available: 523-17:
3 3/4" chrome shift light tacho, black dial, 0–8000 RPM

523-19:
3 3/4" black dial tacho, 0–8000 RPM

520-01:
2 5/8" tacho, 0–8000 RPM, black dial, silver bezel

520-02:
2 5/8" tacho, 0–8000 RPM, white dial, silver bezel

520-20:
5" shift-light tacho, 0–11000 RPM, white dial, silver aluminium housing, clamp connection

523-20:
2" black dial tacho, 0–8000 RPM