Hello. I’d like buy a vintage Omega Constellation (caliber 551, 561, 564) or Seamaster (caliber 562 or 565). I’d prefer one that is as original as possible. Condition of band is not important. Please message me if you have a possibility. I’m buying this as a gift for my son to celebrate the birth of his first child, due in May, and he is an Omega admirer. Thank you all for your help.