Scan of the illustration of genuine #1 from Frumkin's book. A genuine stamp must match this illustration in every detail.

1.) There is a double outline at the top of the dragon's head between the dragon's eyes and horns.
2.) The tips of the horns touch the inner frame line above them.

Forgery of #1

1.) Only a single outline of the top of the dragon's head.
2.) The dragon's horns do not reach the frame line above them.

Exp. F.Kana
 

Forgery of #1

1.) Only a single outline of the top of the dragon's head.
2.) The First of the three Chinese characters in the left side label do not match the genuine. In fact none of them match exactly.

Exp. S. Frumkin