1. Sets
  2. 1977
  3. Technic
  4. Supplementary

LEGO 1977 / Technic / Supplementary Sets

In 1977, LEGO released 2 Technic Supplementary sets, all of these sets have been retired. For that year, the total price of all retail sets cost $19, today those sets are valued around $182, a growth of 859%.
Most valuable 1977 LEGO Technic Supplementary set
871 Supplementary Set $99.67
Most owned 1977 Technic Supplementary set
870 Technical Motor, 4.5 V
2 sets

870 Technical Motor, 4.5 V

Theme / Subtheme Technic / Supplementary
Year 1977
Pieces 22
Availability Retired
870 LEGO Technical Motor, 4.5 V
Retail $8.99
Value $82.27
Growth  +815.1%
Annual growth 4.6%

871 Supplementary Set

Theme / Subtheme Technic / Supplementary
Year 1977
Pieces 78
Availability Retired
871 LEGO Technic Supplementary Set
Retail $9.99
Value $99.67
Growth  +897.7%
Annual growth 4.8%

Year Pricing

Retail
$18.98   (for all 2 sets)
New/Sealed
Value
$181.94
Growth
+858.59%
Annual growth
+4.65%
Used
Value
$77.09

Community Stats

The following are the top 2 most owned 1977 Technic Supplementary sets by LEGO collectors.
#1Technical Motor, 4.5 V
#2Supplementary Set

About LEGO Technic Supplementary

The LEGO Technic Supplementary theme, active from 1977 to 1997, consists of a variety of accessory sets designed to enhance and expand existing Technic models. These sets provided additional parts, such as gears, wheels, axles, and motors, allowing builders to add more functionality and complexity to their creations. Notable sets in this theme include the "870 Technical Motor," which introduced a battery-powered motor for motorizing models, and the "8710 Supplementary Set," a collection of gears and other essential mechanical parts.
1977 LEGO Sets
1977 introduced the Expert Builder series—precursor to Technic—using beams, axles, and gears for mechanically rich models. Town-style sets broadened everyday subjects with houses, shops, and vehicles. Dedicated Space and Castle themes were still a year away, but elements and styling hinted at their imminent arrival.