Mei (signature) : mumei(Unsigned)
Length 1 : 6.98cm x 1.32cm ( 2.75inches x 0.52inches)
Length 2 : 6.92cm x 1.4cm ( 2.72inches x 0.55inches)
Jidai(era) : Edo Period
Special feature: Copper plate with Ama-Ryu (dragon controlling rain) engraved.
Ama Ryu is also called Chiryu or a young dragon and is considered to be at the lowest rank of dragon. Because the Chiryu strive after virtue to become a mature dragon, it is also known as a symbol of growth. Ama Ryu is best known for not having hones and this dragon too has that trait. This dragon does not have hone and the body is just like stream of water.
Aoi estimation paper
In Kiri box.