1. Sets
  2. 1971
  3. Trains
  4. 4.5V

LEGO 1971 / Trains / 4.5V Sets

In 1971, LEGO released 2 Trains 4.5V sets, all of these sets have been retired. For that year, the total price of all retail sets cost $32, today those sets are valued around $217.
Most valuable 1971 LEGO Trains 4.5V set
128-3 Mobile Crane Plate Base $217.39
Most owned 1971 Trains 4.5V set
128-2 Mobile Crane Train Base
2 sets

128-2 Mobile Crane Train Base

Theme / Subtheme Trains / 4.5V
Year 1971
Pieces 23
Availability Retired
128-2 LEGO Mobile Crane Train Base
Retail $2.50

128-3 Mobile Crane Plate Base

Theme / Subtheme Trains / 4.5V
Year 1971
Pieces 38
Availability Retired
128-3 LEGO Trains Mobile Crane Plate Base
Retail $29.99
Value $217.39
Growth  +624.9%
Annual growth 3.7%

Year Pricing

Retail
$32.49   (for all 2 sets)
New/Sealed
Value
~$217.39
Used
Value
$24.57

Community Stats

The following are the top 2 most owned 1971 Trains 4.5V sets by LEGO collectors.
#1Mobile Crane Train Base
#2Mobile Crane Plate Base

About LEGO Trains 4.5V

The LEGO 4.5V train theme ran from 1966 until 1971 and contained 39 sets in all. The 4.5V trains used to be the voltage standard for the first electric LEGO components where the power came from a battery box with 3x 1.5V batteries.
1971 LEGO Sets
In 1971, LEGO broadened its audience with new dollhouse and furniture sets aimed at girls, expanding its reach beyond traditional building themes. In Italy, the Minitalia range grew under import restrictions, offering locally produced sets compatible with the LEGO System. The year also introduced the 1×8×2 arch brick, adding architectural variety. These developments highlighted LEGO’s increasing design diversity and adaptability to regional markets.