Hi Guys, Saw an interesting seamaster on ebay and was wondering your opinion on it. In one of the photos show a bunch of gunk on the back of the watch. Was wondering if you could tell if this was rust - looks like it to me? http://m.ebay.com/itm/Vintage-Omega...-and-Gold-Shell-Case-/201674373490?nav=SEARCHPurchases made through these links may earn this site a commission from the eBay Partner Network