japanese Crane silver box

[trechic]

I have this, what I believe to be, Japanese Pure Silver Box with standing crane.

The cover has a "blackened" background and then the crane in silver and silver "snow" possibly on yellow gold leaves.

On the cover there is a hallmark that I was hoping that the experts here have seen before. Then on the underside are two more marks that would be great to identify.

I appreciate any assistance.

[Yojik]

This box is made by the Miyamoto Shoko (marked on the side of the box):
http://www.smokingsamurai.com/MIYAMOTO_SHOKO.html

The mark on the front lid is probably the name of the maker, but I can't read this one.