Omega calibre 470 was developed by Marc Favre and manufactured exclusively for Omega as a replacement for their bumper automatic movements. The subsequent success of this series and it’s follow up calibre 550 series Marc Favre manufacturing was incorporated to Omega. The calibre 470 family:
470: 17 jewels
471: 19/20 jewels
490: 17 jewels, sub second
491: 19 jewels, sub second
500: 17 jewls
501: 19/20 jewels
502: 17 jewels, date
503: 19/20 jewels, date
504: 24 jewels, date, chronometer
505: 24 jewels, chronometer
Omega calibre: 470-505
- Made approximately: 1953
- Made in Switzerland
- Power reserve 46h
- 17-24 Jewels
- 19800 B/A
- Lift angle 49°
- DM 25.0mm-28mm
- H 5.55mm
Surface finish is of high quality. All screws are highly polished and very good finish. The bridges are nicely finished with copper gilt plating (that do not contain gold;) and angled edges. Ratchet wheel is also the reverser wheel and has a decent finish. Jewel count of 17-24 can be described as a little lacking to adequate for an automatic movement.
Top surface finish on plates: 7-8* Points
Surface finish on screws: 9 Points
Surface finish on ratchet and ratchet wheel: 7 Points
Movement Jeweling: 5-8* Points
Movement is advanced for 1954.
Movement design innovation (for 1954): 8 points
The Omega base plate is nicely decorated and has an overall good finish. Winding, date and setting mechanisms are nicely finished, with a high finish on the screws. Gear train has a good finish. Setting the time feels balanced and smooth. Date mechanism is well made.
Base plate finish: 7 Points
Setting and winding mechanism: 7 Points
Date change snappiness: 6 Points
Gear-train finish: 8 Points
Movement durability: 8 Points
The ratchet wheel has a guard plate, to protect the bridge surface from the ratchet wheel, this helps with durability.
All variants of the Omega 470 series have a nice micro regulator.
2 *extra bonus points for micro regulator
+ 1* extra point for swan neck.
Omega 470-471-490-491-500- 501-502-503-504-505 summary:
Surface finish on bridges and top side of base plate: 7-8*
Surface finish screws: 9
Surface finish on ratchet and ratchet wheel: 7
Movement Jeweling: 5-8*
Movement innovative design for ca 1955: 8
Base plate finish: 7
Setting and winding mechanism: 7
Date change snappiness: 6
Gear-train finish: 8
Movement durability: 8
Total bonus points: 2-3*
Power reserve: 8
Grand total: 98-104*
*Bonus points, date version, higher jewel variant, finer surface finish.
Movement weak points are : Sweep second pinion tension spring (On centre second variant) Barrel arbour bush upper and lower can wear.