Answer

The replica Omega Seamaster Planet Ocean 600M is a copy of the Swiss dive watch. Replicas cost $150 to $800. Quality depends on the factory. Top replicas use clone movements and 316L or 904L stainless steel.

Case and Dimensions

The genuine Planet Ocean 600M comes in several case sizes. These include 39.5mm, 42mm, 43.5mm, and 45.5mm. Replicas often copy the 42mm and 45.5mm versions. Thickness ranges from 14mm to 16.5mm. The genuine has a helium escape valve at 10 o'clock. Many replicas include this valve. The valve does not function on most replicas.

Movements

Genuine models use Omega Co-Axial Master Chronometer calibers 8800, 8900, or 8906. Replicas use clone movements. These include the 8900 clone and the 8500 clone. Some replicas use a Miyota 9015 or a Seiko NH35. These are modified to look like Omega movements. The clone 8900 has a power reserve of about 40 hours. The genuine has 60 hours.

Materials and Finishing

Genuine watches use 316L or 904L stainless steel. Some use titanium or ceramic. Replicas use 316L stainless steel. A few replicas use 904L. The bezel insert is ceramic on the genuine. Replicas use ceramic or aluminum. Sapphire crystal with anti-reflective coating is standard on genuine. Replicas often use sapphire. Some use mineral glass.

Common Differences

The date window position. The genuine has a date at 3 o'clock. Replicas often match. The font on the bezel. The lume color. The genuine uses Super-LumiNova. Replicas use a similar compound. The caseback engravings. The genuine has a seahorse logo. Replicas may have an engraving that is not deep.

Water Resistance

Genuine is rated to 600 meters. Replicas are not tested to that depth. Most replicas are rated to 30 meters or 50 meters. Do not dive with a replica.

Buying Notes

Prices for replicas that cost $400 to $800 are higher quality. Replicas that cost $150 to $300 are lower quality. Factories known for Planet Ocean replicas include VSF, Noob, and ORF. VSF makes the 42mm and 45.5mm versions. Noob makes the 45.5mm version. ORF makes the 39.5mm version. Availability changes. Check with sellers for current stock.