Don't worry about serial numbers, go buy manufacturing date and/or power supply info. If the 12v says 12.1 A, then it's 100% a jasper, also just about any console with a mfr date of 11/08 or later is guaranteed to be a Jasper, unless it's an elite, which probably started showing up last March, maybe a little sooner.
Also, the Jasper systems come with a 150 watt PSU (though they can use the older 175 watt or 203 watt PSU as well, but no other systems can use the 150 watt).