This album has the first decimal Machin definitive issues with the early wider values and without the elliptical section in the perforations. These will, therefore, mostly be from February 1971 to 1993. There are some booklet panes and coil strips included too.
There is a very comprehensive range of variations of colour, printer, head type, value type, perforation gauge, paper coating, phosphor and gum for the mint issues as well examples of good used stamps for most values.