[...] Part number such as 3001 for a 2x4 brick ? Certainly the older CA parts had that, so it must have been in the earliest days. Nita Rae (57 months ago, Sep 5, 2019, to Catalog)
[...] The one or two digit numbers indicate molds and mold cavities in the actual machine that creates the parts from liquid plastic injection. As far as what year TLC started [...] (57 months ago, Sep 5, 2019, to Catalog)
I have just wondering if anyone knew when Lego started putting the part number on the pieces. I have just found part 3176 which looks fairly 'new' but has no part number. [...] (57 months ago, Sep 5, 2019, to Catalog)