What's the difference between stamps and promissory notes?

I believe everyone knows that stamps have been with us for a long time, since we were young. I still remember when we were at school in the 1980s, stamps were an important part of letters and were indispensable. A small stamp records the mood of many people, so how many formats are there? What's the difference between them? Let's talk about it

I. Petty promissory notes

As the name implies, small promissory notes must be small. It consists of several stamps of the same or multiple denominations, printed together and bound into a booklet, which is called a small promissory note. In order to facilitate people to buy, keep and carry stamps of single denomination or multiple denominations, it is called promissory note, also called stamp booklet. Small promissory notes are not as valuable as large ones. In short, the advantage of small promissory notes is that they are easy to carry and read in books.

Second, the Quartet.

Quadruple: When we say that we will definitely think of a square, yes, the so-called quadruple is composed of four stamps, which are square and symmetrical. Four-sided stamps are more valuable than single-sided stamps. The most famous quadruple stamp is the quadruple stamp with the word "draft", which was produced during the period of the New Fourth Army. It was not easy to preserve it in those days, but it was finally presented to the world. The quadrangle looks beautiful and simple, which is convenient for us to mount and collect.

Third, large and small stamps

Generally speaking, large stamps are the format usually used by printing houses when printing stamps. Generally, there are more than 20 stamps per page, and small-scale stamps are individually printed small-scale stamps. Small-scale stamps are usually printed with margins or specific words and patterns around them. Compared with large-size stamps, small-size stamps have less collections, and large-size stamps look more beautiful and imposing. For example, the most famous monkey stamps are very valuable. Whether it is a large-scale ticket or a small-scale ticket, it is a major event of a certain era or something of Chinese medicine significance.