Where from those 7 of Shigefusa Yanagiba Kitaeji

I have got the reply from Shigefusa side about 7 pieces of Yanagiba Kitaeji. The concave flat back side of engraved Shigefusa name are for Nihonbashi Kiya. I guess what all other retail shops have Shigefusa name engraving

on the front bevel side. I was told that it is sure what are made by Shigefusa (not fake), and it must be made before 1989. They were sold to a wholesale company and the wholesale company sold Shigefusa knives to Nihonbashi Kiya, but now, Nihonbashi Kiya buys directly from Shigefusa, and the wholesale company had closed the business, so they might be the old stock for the wholesale company, and they were sold to someone else when Nihonbashi Kiya started to buy Shigefusa knives straight from Shigefusa, or the wholesale company sold them someone else when they closed. That is all what I have got for the history of the seven of the Yanagiba Kitaeji.