Thank you for response. As I wrote it's an AN-S7 MKII. I think it was made in the mid-eighties, so it's definitely not a new design. It is also far more flexible compared to Kondo's new offerings with several loading options.
I think you may confuse it with other step-ups from AN/Kondo if I understand your response right?
Anyway, still looking for answers if someone has done actual comparisons between the AN-S7 MKII and later step-ups from AN UK and Kondo.
BTW, a KSL-FSz would be at least $3700 in Denmark (where I live) if I were to import a unit myself. All imported goods from outside the European Union are being heavily taxed - but it would still be a considerable saving compared to the retail price.
So, if you could direct me to any points of sale in Japan I will perhaps go that route.