1p Machine Stamp Aop?

I'm learning bit to bit making mistakes...I have a budget limited to 25 euros month for stamps, this month I already spent on a batchs of US stamps, so I must wait a couple of months for buy a decent Machin catalog...I really like the Machins for many reasons and one of them is their complexity, and also have many, I could just simply save them in the album, or organize them by their values #8203;#8203;or colors without breaking my head, but I want to know them more deeply...