I posted a better picture of the bottom line stamps. Rod222, are you sure of your identification?
I am often wrong, that's how I move forward.
These can be confusing, but this is how I read it
The basic stamps are Dr Sun Yat Sen
Scott Type A57
Type62 apologies Typo Type 72
The Surcharges on these, the FONT (FOUNT) indicates they are of CENT values
Thumbing through Scott, I came to the conclusion they were not listed.
In Gibbons this is what I found 1969 Page 147
Seems to fit?
Gibbons #415 #416 #418 are the basic stamps of you surcharges