Takeo-san, I spotted this bass on ebay a few days ago, (probably listed by a reseller, and not the shop you have seen it in) and it caught my attention because it has not been seen around. Also, as mentioned, it is a very close relative to my Series I, which is only two numbers older and also medium-scale. Those were some very special instruments. I hope you can secure a fair price to own that one, it looks very nice!
Gaboon Ebony is a very dark black strain of African Ebony... high grade, and quite expensive now. It is interesting that this was included in the build record.