Hi Mathieu,
Congrats on that beautiful Spoiler!
The body shape is the Large Body, in its Point variation, and the headstock shape is the Crown. It's an all-maple neck-through bass with Spoiler electronics, and the serial number contains an S, which make it a Spoiler.
For it to be classed as a Series I instrument, it would need to have Series I electronics, and it could have a Spoiler body shape but still be classed as a Series I bass. That's just the way it works with Alembics.