In 1966, LEGO released 72 Classic Supplemental sets, all of these sets have been retired. For that year, the total price of all retail sets cost $48, today those sets are valued around $2,841.
Most valuable 1966 LEGO Classic Supplemental set
710-2 Lockable Storage Case $283.04
Highest growth 1966 Classic Supplemental set
493-2 European Flags +37714.00%
Largest 1966 LEGO Classic Supplemental set
471 Tiles 52 pieces
Most owned 1966 Classic Supplemental set
400-3 Small Wheels with Axles
1 to 50 of 72 sets

400-3 Small Wheels with Axles

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 12
Availability Retired
400-3 LEGO Small Wheels with Axles
Retail $0.75
Value $36.32
Growth  +4742.7%
Annual growth 5.2%

401-2 Large Wheels with Axles

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 7
Availability Retired
401-2 LEGO Large Wheels with Axles
Retail $0.50
Value $17.57
Growth  +3414.0%
Annual growth 4.9%

402-3 White Turntables

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 5
Availability Retired
402-3 LEGO White Turntables
Retail $0.50
Value $19.87
Growth  +3874.0%
Annual growth 5.1%

403-3 Train Couplers and Wheels

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 12
Availability Retired
403-3 LEGO Train Couplers and Wheels
Retail $0.50
Value $13.35
Growth  +2570.0%
Annual growth 4.5%

414-3 Windows Parts Pack Red

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-3 LEGO Windows Parts Pack Red
Retail $0.50
Value $45.29
Growth  +8958.0%
Annual growth 6.6%

414-4 Windows Parts Pack White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-4 LEGO Windows Parts Pack White
Retail $0.50
Value $39.30
Growth  +7760.0%
Annual growth 6.3%

414-5 Windows Parts Pack Red

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-5 LEGO Windows Parts Pack Red
Retail $0.50
Value $21.84
Growth  +4268.0%
Annual growth 5.3%

414-6 Windows Parts Pack White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-6 LEGO Windows Parts Pack White
Retail $0.50
Value $12.16
Growth  +2332.0%
Annual growth 4.3%

415 5 Sixteens and 4 Twenties

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 9
Availability Retired
415 LEGO 5 Sixteens and 4 Twenties
Retail $0.50
Value $21.90
Growth  +4280.0%
Annual growth 5.3%

416 4 Sixteens 2 Twenties

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
416 LEGO 4 Sixteens 2 Twenties
Retail $0.50
Value $20.38
Growth  +3976.0%
Annual growth 5.2%

417-3 Cornerbricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 5
Availability Retired
417-3 LEGO Cornerbricks
Retail $0.50
Value $21.90
Growth  +4280.0%
Annual growth 5.3%

417-4 Cornerbricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
417-4 LEGO Cornerbricks
Retail $0.50
Value $37.85
Growth  +7470.0%
Annual growth 6.2%

418-2 2x4 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 13
Availability Retired
418-2 LEGO 2x4 Bricks
Retail $0.50
Value $28.69
Growth  +5638.0%
Annual growth 6.4%

418-3 2x4 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 21
Availability Retired
418-3 LEGO 2x4 Bricks
Retail $0.50
Value $41.73
Growth  +8246.0%
Annual growth 6.4%

419-2 2x3 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 15
Availability Retired
419-2 LEGO 2x3 Bricks
Retail $0.50
Value $21.90
Growth  +4280.0%
Annual growth 5.3%

419-3 2x3 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 25
Availability Retired
419-3 LEGO 2x3 Bricks
Retail $0.50
Value $17.58
Growth  +3416.0%
Annual growth 3.0%

420-3 2x2 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 20
Availability Retired
420-3 LEGO 2x2 Bricks
Retail $0.50
Value $18.00
Growth  +3500.0%
Annual growth 4.9%

420-4 2x2 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 33
Availability Retired
420-4 LEGO 2x2 Bricks
Retail $0.50
Value $20.31
Growth  +3962.0%
Annual growth 2.9%

421 1x2 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 44
Availability Retired
421 LEGO 1x2 Bricks
Retail $0.50
Value $20.96
Growth  +4092.0%
Annual growth 3.3%

421-2 2 Eights 2 Sixes 2 Fours 8 Twos 6 Ones

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 20
Availability Retired
421-2 LEGO 2 Eights 2 Sixes 2 Fours 8 Twos 6 Ones
Retail $0.50

422 1x1, 1x2, 1x4, 1x6, 1x8 Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 28
Availability Retired
422 LEGO 1x1, 1x2, 1x4, 1x6, 1x8 Bricks
Retail $0.50
Value $20.96
Growth  +4092.0%
Annual growth 5.2%

423-3 Curved and Round Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 28
Availability Retired
423-3 LEGO Curved and Round Bricks
Retail $0.50
Value $30.77
Growth  +6054.0%
Annual growth 5.9%

423-4 Curved and Round Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 50
Availability Retired
423-4 LEGO Curved and Round Bricks
Retail $0.50
Value $46.80
Growth  +9260.0%
Annual growth 5.4%

426 7 Named Beams

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 7
Availability Retired
426 LEGO 7 Named Beams
Retail $0.50
Value $46.98
Growth  +9296.0%
Annual growth 6.6%

427 8 Pieces 2x8

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
427 LEGO 8 Pieces 2x8
Retail $0.50
Value $128.40
Growth  +25580.0%
Annual growth 8.4%

428 5 Plates 4x8

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 5
Availability Retired
428 LEGO 5 Plates 4x8
Retail $0.50
Value $3.24
Growth  +548.0%
Annual growth 4.4%

429 4 Plates 6x8

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 4
Availability Retired
429 LEGO 4 Plates 6x8
Retail $0.50

430-2 Six Trees and Bushes

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
430-2 LEGO Six Trees and Bushes
Retail $0.50
Value $42.62
Growth  +8424.0%
Annual growth 6.5%

431 Gas Station

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 13
Availability Retired
431 LEGO Gas Station
Retail $0.50
Value $55.64
Growth  +11028.0%
Annual growth 6.9%

432 Road Signs

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
432 LEGO Road Signs
Retail $0.50
Value $41.80
Growth  +8260.0%
Annual growth 6.4%

433 6 Street Lamps with Curved Top

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
433 LEGO 6 Street Lamps with Curved Top
Retail $0.50
Value $99.99
Growth  +19898.0%
Annual growth 5.8%

434 50 Lettered Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 50
Availability Retired
434 LEGO 50 Lettered Bricks
Retail $0.50
Value $53.68
Growth  +10636.0%
Annual growth 6.9%

435-2 Garage Plate and Door

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 3
Availability Retired
435-2 LEGO Garage Plate and Door
Retail $0.50
Value $48.37
Growth  +9574.0%
Annual growth 6.7%

437 50 Numbered Bricks

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 50
Availability Retired
437 LEGO 50 Numbered Bricks
Retail $0.50

445-2 Lighting Device Pack

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 3
Availability Retired
445-2 LEGO Lighting Device Pack
Retail $0.50
Value $87.98
Growth  +17496.0%
Annual growth 7.8%

451 1x6x3 Windows Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
451 LEGO 1x6x3 Windows Red or White
Retail $0.50

452-2 1x6x2 Windows Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
452-2 LEGO 1x6x2 Windows Red or White
Retail $0.50
Value $86.51
Growth  +17202.0%
Annual growth 7.7%

453-2 1x6x2 Shuttered Windows Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
453-2 LEGO 1x6x2 Shuttered Windows Red or White
Retail $0.50
Value $107.84
Growth  +21468.0%
Annual growth 8.1%

454-2 1x4x2 Windows Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 9
Availability Retired
454-2 LEGO 1x4x2 Windows Red or White
Retail $0.50

455-2 1x3x2 Window, Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 12
Availability Retired
455-2 LEGO 1x3x2 Window, Red or White
Retail $0.50

456-2 1x2x2 Window, Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 15
Availability Retired
456-2 LEGO 1x2x2 Window, Red or White
Retail $0.50

457 1x1x2 Windows Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 19
Availability Retired
457 LEGO 1x1x2 Windows Red or White
Retail $0.50

458 1x2x1 Window, Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 19
Availability Retired
458 LEGO 1x2x1 Window, Red or White
Retail $0.50

459 1x1x1 Windows Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 20
Availability Retired
459 LEGO 1x1x1 Windows Red or White
Retail $0.50

460-2 1x2x3 Door, Red or White

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 13
Availability Retired
460-2 LEGO 1x2x3 Door, Red or White
Retail $0.50

461 Windows and Doors, Retailer Pack

Theme / Subtheme Classic / Supplemental
Year 1966
Availability Retired
461 LEGO Windows and Doors, Retailer Pack
Retail $8.00

462-2 2x8 White Plates

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 16
Availability Retired
462-2 LEGO 2x8 White Plates
Retail $0.50
Value $12.16
Growth  +2332.0%
Annual growth 4.3%

463 4x8 White Plates

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
463 LEGO 4x8 White Plates
Retail $0.50
Value $37.33
Growth  +7366.0%
Annual growth 6.2%

464 6x8 White Plates

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
464 LEGO 6x8 White Plates
Retail $0.50
Value $21.84
Growth  +4268.0%
Annual growth 4.7%

470 1x1, 1x2, 2x2, 2x3, 2x4 Plates

Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 39
Availability Retired
470 LEGO 1x1, 1x2, 2x2, 2x3, 2x4 Plates
Retail $0.50
Value $50.55
Growth  +10010.0%
Annual growth 5.1%