i've bought mine for 550 dollars on jomashop last month, beautiful, lightweight but I'm sure it's a fake. Looking at the official fiyta documentation on this watch (I'm talking about the Mars 500), the two pushers buttons of the original are bigger and closer to the body. the finish is not bad, but I found traces of claws on the screws of the back, proof of a refurbished watch or a lack of care in editing. I agree with the previous comments, a limited edition watch of 520 copies that is found for almost two years on all gray market sales sites and group purchases, it smelled bad ... I tried my luck ... missed!
Mine went to timegrapher, it takes between 24 and 27 seconds in each position but with a good beat error of 0.1 and an amplitude of 260-300 which is quite correct.