Rolex Deepsea Sea Dweller automatic issues

[Paulza]

Hi Guys!

Super excited. Bought this replica Rolex Deep Sea. It's a beautiful thing. Got it yesterday. Apologies for the picture quality - in need I can upload better quality pictures.

The movement works fine. However with the caseback on the watch lasts for about an hour then stops. I left the case back off last night and when I woke up the watch was still ticking. Put the caseback on, hand wound it about 15 to 20 times and sure enough stopped and hour later. Took the caseback off again and it's been running no problem the whole day. I can only assume that the caseback is somehow interfering with the movement. Any ideas?

As an aside can the buffs here tell me what movement this is?

Thanks for your help

[madmole]

Put a thicker case back O ring in. Case back must be touching or pressuring something

 

Or take some fine sand paper and rub the black case back over it to reduce the thickness of the sealing surface a little

 

Also check the case back retaining ring o make sure its smooth and hasn't got a lump or something to push on the black back