That isn't really possible - the serial number is applied to the main board before assembly. Sometimes a board will fail testing and go back for re-work, before finally resurfacing days/weeks/months later. Therefore an early serial number could benefit from late production enhancements.

Interestingly, we just received two Mk.2 empeg players from the factory last week with 0900xxxx serial numbers. I'm not sure what took them so long, or what they expect us to do with them!

Rob