HI Angelo! Welcome. Personally I find bank stuff interesting (I work at the Bank of Montreal) and have a small collection of cheques (checks, to our American friends) with revenue stamps on them. Can't speak to any monetary value, but yours are certainly interesting historical documents. How it was done, back in the day! You might consider scanning the inside of that orange premium stamp book. Our cinderella collectors, me among them, would love to see what's inside!