9 million 5513 with much older dial

[kooltzar]

Hi everybody,

Saw this on ebay:

http://www.ebay.ch/itm/271115678707?...t_17273wt_1344

Very strange, as dial is a non wg surround maxi dial Tritium, so much earlier than the watch. Also, the digits of the engraved serial No. do not seem alligned (as if 9 would have been added later, and also 8 is strange).

What do you think? Just an original with a sourced older dial or something smells?