In 1976, LEGO released 8 Trains 4.5V / 12V sets, all of these sets have been retired. For that year, the total price of all retail sets cost $176, today those sets are valued around $3,462, a growth of 1862%.
Most valuable 1976 LEGO Trains 4.5V / 12V set
726 Western Train $1,609.93
Largest 1976 LEGO Trains 4.5V / 12V set
149 Fuel Refinery 328 pieces
Most owned 1976 Trains 4.5V / 12V set
146 Level Crossing
8 sets

146 Level Crossing

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces / Minifigs 68 / 1
Availability Retired
146 LEGO Trains Level Crossing
Retail $19.50
Value $231.00
Growth  +1084.6%
Annual growth 5.1%

147 Refridgerated Wagon

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces / Minifigs 115 / 2
Availability Retired
147 LEGO Trains Refridgerated Wagon
Retail $17.50
Value $244.74
Growth  +1298.5%
Annual growth 5.4%

149 Fuel Refinery

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces / Minifigs 328 / 3
Availability Retired
149 LEGO Trains Fuel Refinery
Retail $39.49
Value $412.15
Growth  +943.7%
Annual growth 4.8%

156-2 Straight Track

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces 25
Availability Retired
156-2 LEGO Trains Straight Track
Retail $19.50
Value $37.74
Growth  +93.5%
Annual growth 2.3%

157 Curved Track

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces 25
Availability Retired
157 LEGO Trains Curved Track
Retail $19.50
Value $34.24
Growth  +75.6%
Annual growth 4.0%

159 Straight Track with Crossing

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces 25
Availability Retired
159 LEGO Trains Straight Track with Crossing
Retail $19.50
Value $48.20
Growth  +147.2%
Annual growth 3.7%

183 Train Set with Motor and Signal

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces 194
Availability Retired
183 LEGO Train Set with Motor and Signal
Retail $20.00
Value $843.86
Growth  +4119.3%
Annual growth 7.8%

726 Western Train

Theme / Subtheme Trains / 4.5V / 12V
Year 1976
Pieces / Minifigs 291 / 3
Availability Retired
726 LEGO Western Train
Retail $21.50
Value $1,609.93
Growth  +7388.0%
Annual growth 9.0%