2 Medium size pictorial Japanese metal work stud buttons.
The Japanese were masters at creating works of art like this pair of studs. This is a magnificent pair of a lost art and not always easy to find a pair. Button collectors typically lump the Shakudo and Shibuichi examples into the same and call them all Shakudo, however, even though the technique employed is the same the metal contents are different as one has 1/4 silver content (Shibuichi) with 3/4ths copper and the other has more copper (Shakudo) with 3-6% gold alloys.

Issued: DIVISION 1=PRE 1918 AND DIVISION 3 IS AFTER 1918
Dimensions: SM=Less than 3/4", Medium=3/4" to 1 1/4". Large=1 1/4" and above, extra large=1 3/4" and above

Unless otherwise noted we find no significant condition concerns except for normal age related wear for the age of these items.