Omega 491
Data: Omega 491 (28 RA PC AM 19 p).
-
19 jewels, automatic wind, hour and minute display, sub second. -
Size: 28.00 mm. -
H: = 5.55 mm. -
N: = 19800 A/h. -
Power reserve: 40 h.
Versions: 25.00 mm.
-
470: 17 jewels (1955). -
471: 19/20 jewels (1955).
Versions: 28.00 mm.
-
490: 17 jewels, sub second (1956). -
491: 19 jewels, sub second (1956). -
500: 17 jewels, center second (1956). -
501: 20 jewels, center second (1956). -
502: 17 jewels, center second, date (1956). -
503: 19/20 jewels, center second, date (1956). -
504: 24 jewels, center second, date, chronometer (1957). -
505: 24 jewels, center second, chronometer (1957).