Today's look back into LEGO® part history comes from Felix Stiessen, an avid LEGO enthusiast from Austria who is always interested in discovering new and interesting techniques to exploit the unique geometry of certain LEGO bricks.
Making its first appearance in 1984’s LEGO Castle range, the basic design of the LEGO® 1x2 plate with a vertical bar attachment has now been around for 35 years. However, in 2008 LEGO introduced a subtle design change that might have gone unnoticed by many.
This article will explore the difference between Design ID 4623 - Plate W. Hook 1X2, and Design ID 88072 - Plate 1X2 W. Vertical Schaft (sic).