This site is about LEGO®.
To be specific about the period 1949 until 1974, a period of 25 years.
There is also an extensive part of the site about FORMO.
This is an interesting formerly Eastgerman toy (DDR-era).
The 1949 until 1974 period may also be known as the pat pend period.
Wherever meaningfull the site also looks beyond this period.
Central theme of this site is to date parts and sets.
The LEGO® this site is about, is LEGO® as collector item.
Old LEGO® that is.
And old LEGO® from before 1974 is actually not a toy anymore.
Some parts from that period are very fragile (have become) and therefore no longer suitable to play with.