Вот что нашел на зарубежных форумах:

Вопрос:

Default Serial Numbers Year Model
How can I tell the year model,

I have been received ST8EW7507110137, is this a an 09 board or and 08 board?

Thanks
Ответ:

ST= Starboard
8=model year
EW= Evo Wave - the model, it can be only one letter
75= size (volume in this case)
0711= year, month of production.
0137= board no 137 of that particular build.

So you have a 08 boards built in november 2007.