Hey @m.rad, I'm not too sure but the leather band says rep to me. I'm no Omega expert either, the seller doesn't look suspicious so. I would just ask him for reference number and piece origin
that should be Omega Cherbourg 396.0941, movement should be Omega cal.1425 ... but yeah, something about it looks off, the Omega seahorse logo on the caseback doesn't look right, either, but this could be because of the photo quality(?)
and I agree with Kwanruan, that leather trap just screams knockoff
but if you're interested, see if they can give you better closeup photos and photo of the movement