Funny, I was just going to post that. Another reseller listing, it's for sale in Japan for 950 USD.
A beautiful and rare guitar (the original Japanese sellers, Ikebe Music in Tokyo, seem to specialize in those, I bought a super-rare Greco SE with a bound neck from them just a few weeks ago), but it's interesting in another sense as well.
I've often wondered what happens when model number "collide" through adding custom features. I mean, add a custom finish to a JB-45 and it would become a JB-50, right? The trouble is that the JB-50 is also another and different catalog model.
Going by the U-stamps (assuming they're original, of course), this one would be an ST-50 with a custom colour (+5k yen) and a matching headstock (+5k yen), which adds up to a 60k price tag. So there's a "collision" with the standard ST-60. As I recall, this is the first time I've seen one with a technically "wrong" model number sticker still in place.
Just great work, I’ve spent my morning looking at the guitars you’ve posted. As the model grades are price then I would logically assume that your information is absolutely spot on with extras costing around 5k yen so you would definitely see step outs of the normal pricing guide like the sonic blue matching headstock that’s a 60k price tag but because of 2 5k upgrades.