URGENT HELP NEEDED: rolex 50th anniversary 16610 green bezel submariner

[jackson]

Dear All,

I have just purchase this watch from ebay. here is the link:

http://cgi.ebay.com/ws/eBayISAPI.dll...DME:L:RTQ:US:1

I would like to know if this watch is authentic. I called and spoke to the seller and the seller is willing to talked over the phone. he has also told me that this watch has been purchased from the jeweller.

However there is one major discrepancy: Its to me that the back case of the watch is engraved with "Rolex oyster original gas escape valve". I would think that the engravings only come onto the sea dweller model.Why am i seeing in on the submariner?I'm really confused that since the watch has been bought from a jeweller and the seller is willing to provide with receipt, this watch cannot be a fake. But still... fake watchs have incorrect engravings like this.

Is anyone able to help me here. Is there a chance that a submariner maybe fitted with a sea dweller oyster case?

I'm totally confused and I need urgent. The seller has also refused paypal payment or personal checks. Money order and casheir's check is prefer by him. I'm really worried here.