In 1955, LEGO released 36 sets, all of these sets have been retired. For that year, the total price of all retail sets cost $71, today those sets are valued around $11,594.
Most valuable 1955 LEGO set
1301 Lego Mosaik Set Large $3,042.75
Highest growth 1955 set
1254-2 1:87 Bedford Flatbed Trailer +66154.29%
Largest 1955 LEGO set
1236-2 Garage 59 pieces
1955 introduced System i Leg (System of Play), organizing bricks, sets, and accessories around a consistent town-building scale and launching Town Plan.
36 sets

1200 Town Plan Board Large Plastic

Theme / Subtheme System i Leg / Town Plan
Year 1955
Availability Retired
1200 LEGO Town Plan Board Large Plastic
Retail $4.25
Value $391.29
Growth  +9106.8%
Annual growth 6.6%

1210-2 Small Store Set

Theme / Subtheme System i Leg / Town Plan
Year 1955
Pieces 30
Availability Retired
1210-2 LEGO Small Store Set
Retail $3.00
Value $569.18
Growth  +18872.7%
Annual growth 7.7%

1211-2 Small House Set

Theme / Subtheme System i Leg / Town Plan
Year 1955
Pieces 22
Availability Retired
1211-2 LEGO Small House Set
Retail $2.00
Value $1,295.07
Growth  +64653.5%
Annual growth 9.6%

1212-2 Small House Left Set

Theme / Subtheme System i Leg / Town Plan
Year 1955
Pieces 21
Availability Retired
1212-2 LEGO Small House Left Set
Retail $2.00
Value $253.82
Growth  +12591.0%
Annual growth 7.1%

1213-2 Small House Right Set

Theme / Subtheme System i Leg / Town Plan
Year 1955
Pieces 21
Availability Retired
1213-2 LEGO Small House Right Set
Retail $2.00
Value $164.08
Growth  +8104.0%
Annual growth 6.4%

1214-2 Windows and Doors

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 6
Availability Retired
1214-2 LEGO Windows and Doors
Retail $1.00
Value $2.03
Growth  +103.0%
Annual growth 1.0%

1215-2 2x8 & 2x10 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 5
Availability Retired
1215-2 LEGO 2x8 & 2x10 Bricks
Retail $1.00
Value $1.54
Growth  +54.0%

1216-2 4x4 Corner Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 5
Availability Retired
1216-2 LEGO 4x4 Corner Bricks
Retail $1.00

1217-2 2x4 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 13
Availability Retired
1217-2 LEGO 2x4 Bricks
Retail $1.00
Value $1.93
Growth  +93.0%

1218-2 2x3 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 15
Availability Retired
1218-2 LEGO 2x3 Bricks
Retail $1.00
Value $2.01
Growth  +101.0%
Annual growth 2.3%

1219-2 2x2 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 20
Availability Retired
1219-2 LEGO 2x2 Bricks
Retail $1.00
Value $1.42
Growth  +42.0%

1220-2 1x2 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 26
Availability Retired
1220-2 LEGO 1x2 Bricks
Retail $2.00
Value $32.51
Growth  +1525.5%
Annual growth 4.0%

1221-2 1x1 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 40
Availability Retired
1221-2 LEGO 1x1 Bricks
Retail $1.00

1222-2 1x1 Round Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 40
Availability Retired
1222-2 LEGO 1x1 Round Bricks
Retail $1.00
Value $45.14
Growth  +4414.0%
Annual growth 5.5%

1223-2 2x2 & 2x4 Curved Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 14
Availability Retired
1223-2 LEGO 2x2 & 2x4 Curved Bricks
Retail $2.00

1224-1-1 8 Danish Named Beams

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 8
Availability Retired
1224-1-1 LEGO 8 Danish Named Beams
Retail $2.00
Value $8.06
Growth  +303.0%
Annual growth 1.5%

1224-2 8 Named Beams

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 8
Availability Retired
1224-2 LEGO 8 Named Beams
Retail $2.00

1224A 1x6 and 1x8 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 9
Availability Retired
1224A LEGO 1x6 and 1x8 Bricks
Retail $2.00
Value $29.42
Growth  +1371.0%
Annual growth 3.9%

1225-2 Mixed Plates Parts Pack

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 6
Availability Retired
1225-2 LEGO Mixed Plates Parts Pack
Retail $2.00
Value $8.90
Growth  +345.0%
Annual growth 2.8%

1230-2 Windows and Door without Glass

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 7
Availability Retired
1230-2 LEGO Windows and Door without Glass
Retail $1.00
Value $30.26
Growth  +2926.0%
Annual growth 4.9%

1235-2 Garage Plate and Door

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 3
Availability Retired
1235-2 LEGO Garage Plate and Door
Retail $3.00
Value $107.18
Growth  +3472.7%
Annual growth 5.2%

1236-2 Garage

Theme / Subtheme System i Leg / Town Plan
Year 1955
Pieces 59
Availability Retired
1236-2 LEGO Garage
Retail $3.65
Value $527.85
Growth  +14361.6%
Annual growth 7.3%

1240-2 8 Road Signs

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 8
Availability Retired
1240-2 LEGO 8 Road Signs
Retail $2.00

1241-2 8 Road Signs

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 8
Availability Retired
1241-2 LEGO 8 Road Signs
Retail $2.00

1247-2 Esso Pumps and Sign

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 2
Availability Retired
1247-2 LEGO Esso Pumps and Sign
Retail $2.00
Value $313.03
Growth  +15551.5%
Annual growth 7.4%

1248-2 Painted Trees and Bushes

Theme / Subtheme System i Leg / Supplemental
Year 1955
Pieces 6
Availability Retired
1248-2 LEGO Painted Trees and Bushes
Retail $2.00

1250-2 1:87 Esso Bedford Tanker

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1250-2 LEGO 1:87 Esso Bedford Tanker
Retail $1.15
Value $416.55
Growth  +36121.7%
Annual growth 8.7%

1251-2 1:87 Esso Bedford Truck

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1251-2 LEGO 1:87 Esso Bedford Truck
Retail $1.40
Value $268.61
Growth  +19086.4%
Annual growth 7.7%

1252-2 1:87 Esso Bedford Trailer

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1252-2 LEGO 1:87 Esso Bedford Trailer
Retail $1.40
Value $297.39
Growth  +21142.1%
Annual growth 7.8%

1253-2 1:87 Bedford Flatbed Truck

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1253-2 LEGO 1:87 Bedford Flatbed Truck
Retail $1.15
Value $144.12
Growth  +12432.2%
Annual growth 7.0%

1254-2 1:87 Bedford Flatbed Trailer

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1254-2 LEGO 1:87 Bedford Flatbed Trailer
Retail $0.70
Value $463.78
Growth  +66154.3%
Annual growth 7.8%

1255-2 1:87 Bedford Fire Engine

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1255-2 LEGO 1:87 Bedford Fire Engine
Retail $1.40
Value $491.99
Growth  +35042.1%
Annual growth 8.6%

1256-2 1:87 Bedford Tow Truck

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1256-2 LEGO 1:87 Bedford Tow Truck
Retail $1.40
Value $395.62
Growth  +28158.6%
Annual growth 8.3%

1257-2 1:87 Bedford Delivery Truck

Theme / Subtheme System i Leg / HO 1:87 Vehicles
Year 1955
Availability Retired
1257-2 LEGO 1:87 Bedford Delivery Truck
Retail $1.15
Value $343.17
Growth  +29740.9%
Annual growth 8.4%

1300 Lego Mosaik Set Small

Theme / Subtheme System i Leg / Mosaic
Year 1955
Pieces 47
Availability Retired
1300 Mosaic Lego Mosaik Set Small
Retail $4.00
Value $1,945.31
Growth  +48532.8%
Annual growth 9.1%

1301 Lego Mosaik Set Large

Theme / Subtheme System i Leg / Mosaic
Year 1955
Availability Retired
1301 Mosaic Lego Mosaik Set Large
Retail $7.85
Value $3,042.75
Growth  +38661.1%
Annual growth 8.8%