1. Sets
  2. 1957
  3. System i Leg
  4. Supplemental

LEGO 1957 / System i Leg / Supplemental Sets

In 1957, LEGO released 11 System i Leg Supplemental sets, all of these sets have been retired. For that year, the total price of all retail sets cost $23, today those sets are valued around $397.
Most valuable 1957 LEGO System i Leg Supplemental set
1242-2 International Flags $267.49
Largest 1957 LEGO System i Leg Supplemental set
1234-2 Letter Bricks 50 pieces
Most owned 1957 System i Leg Supplemental set
283 Red Sloping Ridge and Valley Bricks
11 sets

214-4 Windows and Doors Retailer Pack

Theme / Subtheme System i Leg / Supplemental
Year 1957
Availability Retired
214-4 LEGO Windows and Doors Retailer Pack
Retail $8.00

225 1x6 and 1x8 Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1957
Availability Retired
225 LEGO 1x6 and 1x8 Bricks
Retail $0.50

283 Red Sloping Ridge and Valley Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 20
Availability Retired
283 LEGO Red Sloping Ridge and Valley Bricks
Retail $0.50
Value $28.79
Growth  +5658.0%
Annual growth 4.0%

283-2 Blue Sloping Ridge and Valley Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 20
Availability Retired
283-2 LEGO Blue Sloping Ridge and Valley Bricks
Retail $0.50
Value $73.59
Growth  +14618.0%
Annual growth 6.4%

1223-3 2x2 Curved Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 20
Availability Retired
1223-3 LEGO 2x2 Curved Bricks
Retail $0.50

1231-4 Windows and Doors Retailer Pack

Theme / Subtheme System i Leg / Supplemental
Year 1957
Availability Retired
1231-4 LEGO Windows and Doors Retailer Pack
Retail $8.00
Value $18.78
Growth  +134.8%
Annual growth 4.6%

1233-2 Light Masts

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 4
Availability Retired
1233-2 LEGO Light Masts
Retail $0.50

1234-2 Letter Bricks

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 50
Availability Retired
1234-2 LEGO Letter Bricks
Retail $0.50

1242-2 International Flags

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 5
Availability Retired
1242-2 LEGO International Flags
Retail $0.50
Value $267.49
Growth  +53398.0%
Annual growth 4.5%

5 Danish Flags

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 5
Availability Retired
LEGO 5 Danish Flags
Retail $0.50

1245-2 Lighting Device Pack

Theme / Subtheme System i Leg / Supplemental
Year 1957
Pieces 3
Availability Retired
1245-2 LEGO Lighting Device Pack
Retail $3.00
Value $8.09
Growth  +169.7%
Annual growth 3.7%

Year Pricing

Retail
$23.00   (for all 11 sets)
New/Sealed
Value
~$396.74
Unfortunately, accurate retail and value pricing for all sets released in 1957 is unavailable. Production was highly limited during this period, with distribution primarily in Denmark and some availability in neighboring countries like Sweden, Germany, and Norway. Additionally, records from this period are scarce, and original pricing information is not well-documented. As a result, determining precise values for these sets remains a challenge.

Community Stats

The following are the top 10 most owned 1957 System i Leg Supplemental sets by LEGO collectors.
#1Red Sloping Ridge and Valley Bricks
#21x6 and 1x8 Bricks
#3Blue Sloping Ridge and Valley Bricks
#4International Flags
#5Light Masts
#65 Danish Flags
#7Lighting Device Pack
#82x2 Curved Bricks
#9Windows and Doors Retailer Pack
#10Windows and Doors Retailer Pack

About LEGO System i Leg Supplemental

Starting in the 1950s LEGO began individual parts sales, a practice that began with the Ferguson Tracktor in 1951. LEGO would supply dealers with wooden parts boxes and refill packs. These individual part sales would continue, at least in some markets, into the late 1950’s.
1957 LEGO Sets
1957 marked LEGO’s 25th anniversary and a turning point in leadership. Founder Ole Kirk Christiansen’s health had declined, leading to the appointment of his son Godtfred Kirk Christiansen as Managing Director. The company continued to refine the System i Leg range and introduced the 700-series wooden box sets. Multilingual packaging appeared for the first time to support LEGO’s growing international markets. LEGO Schweiz was founded in Switzerland—the company’s first subsidiary outside Denmark—signaling the beginning of true global expansion.