T480.  Iron sukashi tsuba of a stylized dragonfly.  6.7 x 6.8 x .2 cm.  The nakago hitsu-ana is .8 x 1.8 cm.  The collector I bought this tsuba from gave it to Katchushi (armor maker) but Tosho (swordsmith) is another possibility.  With this thin a plate, I would add Ko (old) in front of those names.  There are small tekkotsu everywhere on the rim and uniform tsuchime on the plate; condition is excellent.  $225.