Looks very similar to GA880002, yet this watch is priced lower because of different meteorites. The more expensive models use imported natural meteorites that cost more. This model uses the precious natural meteorite that fell within China, thus costing less. Apart from the different meteorites, the movement is different. The more expensive models are installed with ultra-thin movement. This watch is installed with regular movement. The case thickness is measured at 9.6mm vs.11.3mm.
The Mars 500, rover and Mars surface patterns are engraved on its case back.