It is interesting and conclusion is yes, you are right that those are sample/specimen on the catalogue.
First of all, any revenue stamps are cancelled at the point of the stamps are used/applied on a receipt. Anyone can cancel them using their own rubber seal & ink (or even writing name) - and this system is still on in this modern days.
So, I thought the circled "erase" could be sample cancellation shown. But after I read the catalogue description, my conclusion is "they are just sample/specimen which were sent to postal office branches all over the nation".
A few translations:
Revenue stamps for medicine, applied on the seal of paper bag when medicine was sold, then canceled at that point. Stripe types were used to seal bottles, not cancelled because they are broken off when the bottle is opened.
Variety of perforations
3 types (121, 121, 123) exist only sample/specimen mark of "round" and "erase"
No mints of 1, 2 and 3 Rin are existing
Below is the modern examples of "How to cancel revenue stamps" images. Haha