#156 Did You Know: Multiple versions of the same piece....

Did you know that elements have had multiple versions made over the years, all with small but generally noticeable changes?

They are usually classified with the part number then a letter or words to distinguish the versions from each other.

For example, there are 6 versions of the classic 2x4 brick (see picture) and on Bricklink you can see the differences between them: https://www.bricklink.com/v2/catalog/catalogitem.page?P=3001#T=S&O={"iconly":0}

This is worth knowing as a builder to make sure you order the right version of a piece. Always check the title, which may include a or b to signify which version it is, such as 3001a or 3001b.