Up for sale is this Omega Seamaster Cal. 501, I'm asking $545 shipped in the U.S. Everything is original (crown, crystal, dial, case, movement). I do not know the service history, but the movement generally looks clean and has been keeping decent time. Case is in good condition with the chamfers still showing, and it measures about 34mm in diameter excluding the crown. Dial has a scratch between the 5 and 6, but it's very thin and seen only at certain angles. It's much more prominent in the pictures than in real life, and it looks more like a scratch on the crystal in person. It also has the cool big Seamonster back, and it comes on an 18mm deBeer leather strap shown in the pictures. If you're interested or have any questions feel free to email me at kyleLkyleL@gmail.com. Thanks!
More pictures here