(...) Yes, there are many smaller variations in brick molds than what is shown on Peeron. That site only tracks 'functional' differences in the brick. That is changes that effect the way you use bricks to build things. Many of the smaller mold (...) (20 years ago, 31-Mar-05, to lugnet.parts)
(...) As Clark stated, dating Lego can be very tricky. Old molds were often used at the same time as new molds. TLG rarely discarded them if there was still life left in them. Here is a list that shows major brick changes (between Cellulose Acetate (...) (20 years ago, 1-Apr-05, to lugnet.parts)
