Sorry, but Peledog is correct, this is a Euro4. It has the matte finish bridge (without logo), neck inlays, and solid wings with the Double-S headstock. It oddly, has older style Schaller Tuners with the anchor screw at 90 degrees from the body, whereas newer Schallers have the anchor screw to the bottom center of the tuner (if it is in a rack). I'm honestly not sure when that tuner design changed for Schaller.
Phat, back me up on this one... it's not unusual for early SSD Euro models to be lacking a serial number on the headstock, and it's not unusual for a gloss white Euro (of any age) to not have the SERIAL NUMBER on the headstock. But I've yet to see a Euro model since the Spector Trademark was back in place (1997) that the basses didn't have the "Precision Crafted Under License in the Czech Republic" and Stuart's stamped signature.
So my best guess, especially looking at the color, which is a little different than our typical "Amber" finish (but this could be the photos) is that this bass was refinished at some point.
As long as the neck/truss rod is OK, it looks like a great player. These solid-wing Euro Models are favored by some... to others this or the LX (sandwich wing) models are equally appealing.
If it goes for under $1000... someone's getting a nice guitar at a decent price.
It does bother me that the truss rod cover is missing. Another sign that perhaps it was refinished. Stuff gets lost when you take it off and leave it off for a while sometimes.