>Yes, except serial numbers should be sequential from the same >factory unless they designate a different series in some way. >I would be curious as to whether 30xxxxx cameras are made in >Japan. Maybe there is a factory difference.
Sequential or not I don't think there should be 2 cameras with the same serial number. The reason here because after 304xxxx there are only 4 digits. As far as I know Nikon D800 selling like hot cakes so they should sell more than 9999 cameras with 304xxxx. That means 3059999 and 3069999 and so on. This is kind of strange because I though they are making 10K cameras per month and even if they started with 300xxxx it should be more like 312xxxx by now if my math serves me right.