I may have a bead on one though - Model A....
I spoke to RR about his experiences and tests he performed with the Sharp and Heirinkan. Quite impressive accuracy at 50 yards with both brands with the edge going to Heirinkan in power and accuracy! We lamented over the loss of airguns past and promised "via pinky swear" that if given the opportunity to own them again would never let em go again!!
What a great wealth of AG knowledge and love for the sport Ron has. His new book is in the wings and should be out in a year or so. He says it will include past tests (including the Jap guns) plus an additional ~150 guns -- an all inclusive Volume!!!
We're ready Ron! Let us know when completed!