Identifying Backstamp on Japanese Piece

[patack]

Hi,

I can't find the maker of this backstamp and can use your help.

Thank you.

[Stan]

I could not find a mark like this in my books of Japanese marks, but from experience it is more than likely to be from the 1st half of the 20th century, after 1920.

[patack]

Thank you.  Well, there must be something out there with this mark, but I'll be darned if I can find it :)

Here is a link to three pieces with that mark:
www.flickr.com/photos/69738387@N02/19100974061/in/dateposted-public/

Yes, they do appears to be 20s or thereabouts.

All best,
Pat