Always provide weight and diameter, that makes identification much easier. For your coin, 5 Sen 1920 (regnal year 9), there are two different types:
- a large type, 4.28 g., 20.6 mm:
https://en.numista.com/catalogue/pieces24457.html
- a small type, 2.63 g., 19.1 mm:
https://en.numista.com/catalogue/pieces9580.html
So you have to weigh your coin to know which type it is.
