Review Omega 470-505

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:
Dm= 25mm:
470: 17 jewels
471: 19/20 jewels
Dm= 28mm:
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. 

The autowinder winds in both directions and is very smooth when winding manually 

Autowinder: 8 Points 

These Omega moments in good condition keep excellent time.  

Accuracy: 8 points + 1 points* on chronometer version

Power reserve of 46 hours is very good.

Power reserve: 8 Points

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*

Autowinder: 8

Accuracy: 8-9*

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.