- ETA 2451 base (2452 w/date)

- 11.5 ligne

- 18,000 beats per hour

- 17 jewels

- Found in 1960s Benrus date model

Ranfft database

- 10.5 ligne

- 18,000 beats per hour

- 23 jewels

- Found in 1970 Bulova date model

- ETA 2872

- 11.5 ligne

- 28,800 beats per hour

- 17 jewels

- Seen in 1982 Bulova Super Seville

Ranfft database

- 11.5 ligne

- 18,000 beats per hour

- 17 jewels

- Found in 1956 Bulova

Ranfft database

- 11.5 ligne

- 18,000 beats per hour

- 17 & 23 jewel variants

- seen here in 17 jewel model circa 1966

Ranfft database

- 11BL base caliber

- 11.5 ligne

- 18,000 beats per hour

- 17 & 23 jewel variants

- Seen in 17 jewel 1969 Oceanographer 'M'

Ranfft database

- A. Schild 1902 base caliber

- 11.5 ligne

- 21, 600 beats per hour

- 17, 21, 25 jewel variants

- Seen in a circa 1970 Elgin diver

Ranfft database

- 11.5 ligne

- 28,800 beats per hour

- 17, 21, and 25 jewel variants

- Seen in circa 2015 Bulova (Citizen) A-15 re-edition

Ranfft database

- modified ETA 2452

- 11.5 ligne

- 18,000 beats per hour

- 17 & 21 jewel variants

-found in mid-1960s Accumatic A-506

Ranfft database

- A. Schild 1700 base caliber

- 11.5 ligne

- 18,000 beats per hour

- 100 jewels (83 on winding rotor)

- seen on 1960's Waltham Autochron

Ranfft database