Tough to tel with just one angle, 3/4's or full most likely but done on a large wheel, no wheel progression. Maybe get a shot directly facing toe and one between toe and side. Gorgeous razer by the way.
Yes it is hard to tell from a picture, it felt-sounded like when stropping, and shaving with it, that it might be a 1/2 grind on the blade, but I am no expert by any means.
It's definitely a quarter hollow I think those models were made for the Japanese market I saw that particular razor on a Japanese auction a little while back.
I'm sure the razor was for sale for quite sometime in the BST section over on the SRP the seller comes from Japan. PS if you google that model you will find many on the market.
Yes a lot of Japanese razors get snapped up by a few Russian buyers then sold on from a few Japanese auction sites.
I would also like to know if possible. I will just window shop. I have 3 under construction at the moment taking all my money. If it's your little secret then I understand as well.