Scan of the illustration of a genuine #1 from S.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 eyes and the horns.
(2.) All the tips of the horns touch the inner frame line above them.
Shanghai Forgery
Forgery of Shanghai #1
(1.) There is only a single outline at the top of the dragon's head.
(2.) The dragons horns do not reach the frame line above them.
(3.) Exp: F.Kana. Notes:do.
Forgery of Shanghai #1
(1.) Only a single outline at 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.
(3.) Exp: S.Frumkin. Notes:do.