- Modified ETA 900 (ETA 930)

- 11.5 ligne

- 18,000 beats per hour

- 17 jewels

- Seen in 1950s Benrus day/date pointer

Ranfft database

- ETA 2451 base (2452 w/date)

- 11.5 ligne

- 18,000 beats per hour

- 17 jewels

- Found in 1960s Benrus date model

Ranfft database

-Subseconds

- 10.5 ligne

- 18,000 beats per hour

- 15, 17, and 21 jewel variants

- Found in 1942 Bulova

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

- 11.5 ligne

- 18,000 beats per hour

- 17 jewels

- Seen in 1965 Bulova

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

- 12.5 ligne

- electronically controlled tuning fork

- 13 jewels

- Seen here is 1976 model

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

- Subseconds

- Previously Unitas 6498

- 16.5 ligne

- 18,000 beats per hour

- 17 jewels

Ranfft database

- Handwind column wheel chronograph

- 17 jewels

- 3 subdials (up to 12hr record)

- Found in '70s Gallet MultiChron Pilot

Ranfft Database

- Subseconds

- 14/0 size

- 18,000 beats per hour

- 19 jewels

- Found in 1948 Hamilton Norman

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

- 18,000 beats per hour

- 17 jewels

- Found in circa 1956 Omega

Ranfft database

- Subseconds

- 18,000 beats per hour

- 17 jewels

- Found in circa 1961 Omega

Ranfft database

- Subseconds

- predecessor of ETA 6498

- 16.5 ligne

- 18,000 beats per hour

- 17 jewels

- Seen here marked "R. Pavot Watch Co."

Ranfft database

- 14 ligne

-18,000 beats per hour

- 17 jewels

- Found in 1970's Aero Watch pocket watch

Ranfft database

- 14 ligne

- 18,000 beats per hour

- 17 jewels

- Found in circa 1970 Wakmann

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