LEGO Technic / Supplementary

Supplementary is a subtheme of Technic that consists of 18 sets that ran from 1977 to 1997. Most sets were released in 1979 which accounted for 7 sets. As of today, the average annual growth of all the sets in Technic Supplementary is around 4.3% per year. The current value of all sets in new/factory sealed condtion is $1,487.65. As of today, 877 Steering Gear Parts is the most valuable set in Technic Supplementary with an estimated new/factory sealed value of $174.69.

Most valuable LEGO Supplementary set
877 Steering Gear Parts - $174.69

Largest LEGO Supplementary set
8710 Technical Elements - 124 pieces

Most owned Supplementary set
8720 9V Motor Set

TECHNIC is one of The LEGO Company's main lines based on creating detailed model machines and mechanical toys with specialized beams, axles, gears and connectors and primarily designed for older children and adults. The theme was first introduced as the Expert Builder series in 1977, but was officially renamed as TECHNIC in 1984. TECHNIC is still an active theme, and is one of the longest running themes in LEGO history. While most TECHNIC sets are vehicles that use pieces to mimic real vehicles, such as engine pieces, suspension, pneumatic, and transmission pieces, the TECHNIC parts have been used by various other System themes as well as LEGO Mindstorms.