Hi Bj neither of these are the UPO as we would say on the boards as they are both ceramic versions of the planet oceans watches, the UPO was an older model of these, are you looking at the newer ceramic or older 2500 type Omega? Either way mate a quick search if the forum will give you a multitude of threads on the Planet Ocean models, the depth of knowledge here runs very deep all you need to do is jump in [emoji12][emoji12] Sent from my iPhone using Tapatalk