That would appear to be a counterfeit, 14900s are among the most copied Constellation references. The case is missing a lot of detail vs the real Omega version. Walk away for sure.
https://download1479.mediafire.com/...0mb/Counterfeit_Omega_Constellation_Cases.pdf
I would've guessed this is something more frankenish but mostly original parts
Fooled me if it's completely fake, up close it should be easier to tell, but from photos, they did an ok job replicating things
Up close they feel really off but the mid case is the easiest piece to recognise in pics, the fakes have this sort of band in the center with rounded edges rather than the machined facets of the real case and on the real ones the lugs blend in to the mid upper facet near the bezel. The stars and shape of the case back medallion is also typical of the common counterfeits that have been around for a long time.
Up close they feel really off but the mid case is the easiest piece to recognise in pics, the fakes have this sort of band in the center with rounded edges rather than the machined facets of the real case and on the real ones the lugs blend in to the mid upper facet near the bezel. The stars and shape of the case back medallion is also typical of the common counterfeits that have been around for a long time.
Can you help me to point out and elaborate more on the band in the center with round edges, I still am not sure where it is?
Page 2 of that document shows it fairly well