Hi All
The airframe photographed at Inyokern is NOT HS.125-700A NA0288 (257123). This is an earlier series HS.125 Painted in the same colours as NA0288 - the giveaway is the fairing above the cockpit, the 5 windows as opposed to 6 on a series 700 machine, and the engine pods which are not Garrett TFE-731's but more likely Viper 522's.
So this airframe is a mystery unless someone can get aboard and look at the data plate (usually immediately in front of you as you enter the aircraft on the bulkhead next to the baggage storage rack).
Cheers
JD