In 1966, LEGO released 72 Classic Supplemental sets, all of these sets have been retired.
Most valuable 1966 LEGO Classic Supplemental set
710-2 Lockable Storage Case $245.26
Highest growth 1966 Classic Supplemental set
493-2 European Flags +48398.00%
Largest 1966 LEGO Classic Supplemental set
471 Tiles 52 pieces
Most owned 1966 Classic Supplemental set
401-2 Large Wheels with Axles
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 12
Availability Retired
400-3 LEGO Small Wheels with Axles
Retail $0.75
Value $31.30
Growth  4073.3%
Annual growth 5.4%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 7
Availability Retired
401-2 LEGO Large Wheels with Axles
Retail $0.50
Value $16.20
Growth  3140.0%
Annual growth 4.9%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 5
Availability Retired
402-3 LEGO White Turntables
Retail $0.50
Value $26.41
Growth  5182.0%
Annual growth 5.8%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 12
Availability Retired
403-3 LEGO Train Couplers and Wheels
Retail $0.50
Value $13.30
Growth  2560.0%
Annual growth 4.6%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-3 LEGO Windows Parts Pack Red
Retail $0.50
Value $41.12
Growth  8124.0%
Annual growth 6.6%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-4 LEGO Windows Parts Pack White
Retail $0.50
Value $34.67
Growth  6834.0%
Annual growth 6.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-5 LEGO Windows Parts Pack Red
Retail $0.50
Value $32.33
Growth  6366.0%
Annual growth 6.2%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
414-6 LEGO Windows Parts Pack White
Retail $0.50
Value $11.36
Growth  2172.0%
Annual growth 4.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 9
Availability Retired
415 LEGO 5 Sixteens and 4 Twenties
Retail $0.50
Value $20.04
Growth  3908.0%
Annual growth 5.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
416 LEGO 4 Sixteens 2 Twenties
Retail $0.50
Value $18.71
Growth  3642.0%
Annual growth 5.2%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 5
Availability Retired
417-3 LEGO Cornerbricks
Retail $0.50
Value $20.04
Growth  3908.0%
Annual growth 5.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 10
Availability Retired
417-4 LEGO Cornerbricks
Retail $0.50
Value $33.46
Growth  6592.0%
Annual growth 6.2%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 13
Availability Retired
418-2 LEGO 2x4 Bricks
Retail $0.50
Value $20.04
Growth  3908.0%
Annual growth 5.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 21
Availability Retired
418-3 LEGO 2x4 Bricks
Retail $0.50
Value $37.16
Growth  7332.0%
Annual growth 6.4%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 15
Availability Retired
419-2 LEGO 2x3 Bricks
Retail $0.50
Value $20.04
Growth  3908.0%
Annual growth 5.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 25
Availability Retired
419-3 LEGO 2x3 Bricks
Retail $0.50
Value $30.59
Growth  6018.0%
Annual growth 3.8%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 20
Availability Retired
420-3 LEGO 2x2 Bricks
Retail $0.50
Value $19.54
Growth  3808.0%
Annual growth 5.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 33
Availability Retired
420-4 LEGO 2x2 Bricks
Value $21.78
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 44
Availability Retired
421 LEGO 1x2 Bricks
Retail $0.50
Value $24.12
Growth  4724.0%
Annual growth 5.6%
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
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 28
Availability Retired
422 LEGO 1x1, 1x2, 1x4, 1x6, 1x8 Bricks
Retail $0.50
Value $18.37
Growth  3574.0%
Annual growth 5.2%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 28
Availability Retired
423-3 LEGO Curved and Round Bricks
Retail $0.50
Value $27.90
Growth  5480.0%
Annual growth 5.9%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 50
Availability Retired
423-4 LEGO Curved and Round Bricks
Retail $0.50
Value $40.41
Growth  7982.0%
Annual growth 5.8%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 7
Availability Retired
426 LEGO 7 Named Beams
Retail $0.50
Value $47.57
Growth  9414.0%
Annual growth 6.9%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
427 LEGO 8 Pieces 2x8
Retail $0.50
Value $108.03
Growth  21506.0%
Annual growth 8.4%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 5
Availability Retired
428 LEGO 5 Plates 4x8
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 4
Availability Retired
429 LEGO 4 Plates 6x8
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
430-2 LEGO Six Trees and Bushes
Retail $0.50
Value $38.47
Growth  7594.0%
Annual growth 6.5%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 13
Availability Retired
431 LEGO Gas Station
Retail $0.50
Value $40.36
Growth  7972.0%
Annual growth 6.6%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
432 LEGO Road Signs
Retail $0.50
Value $38.00
Growth  7500.0%
Annual growth 6.5%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
433 LEGO 6 Street Lamps with Curved Top
Retail $0.50
Value $110.16
Growth  21932.0%
Annual growth 10.6%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 50
Availability Retired
434 LEGO 50 Lettered Bricks
Retail $0.50
Value $48.93
Growth  9686.0%
Annual growth 6.9%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 3
Availability Retired
435-2 LEGO Garage Plate and Door
Retail $0.50
Value $44.70
Growth  8840.0%
Annual growth 6.8%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 50
Availability Retired
437 LEGO 50 Numbered Bricks
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 3
Availability Retired
445-2 LEGO Lighting Device Pack
Retail $0.50
Value $79.51
Growth  15802.0%
Annual growth 7.8%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
451 LEGO 1x6x3 Windows Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
452-2 LEGO 1x6x2 Windows Red or White
Retail $0.50
Value $76.81
Growth  15262.0%
Annual growth 7.8%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
453-2 LEGO 1x6x2 Shuttered Windows Red or White
Retail $0.50
Value $95.29
Growth  18958.0%
Annual growth 8.2%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 9
Availability Retired
454-2 LEGO 1x4x2 Windows Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 12
Availability Retired
455-2 LEGO 1x3x2 Window, Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 15
Availability Retired
456-2 LEGO 1x2x2 Window, Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 19
Availability Retired
457 LEGO 1x1x2 Windows Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 19
Availability Retired
458 LEGO 1x2x1 Window, Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 20
Availability Retired
459 LEGO 1x1x1 Windows Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 13
Availability Retired
460-2 LEGO 1x2x3 Door, Red or White
Retail $0.50
Theme / Subtheme Classic / Supplemental
Year 1966
Availability Retired
461 LEGO Windows and Doors, Retailer Pack
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 16
Availability Retired
462-2 LEGO 2x8 White Plates
Retail $0.50
Value $11.36
Growth  2172.0%
Annual growth 4.3%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 8
Availability Retired
463 LEGO 4x8 White Plates
Retail $0.50
Value $32.33
Growth  6366.0%
Annual growth 6.2%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 6
Availability Retired
464 LEGO 6x8 White Plates
Retail $0.50
Value $25.03
Growth  4906.0%
Annual growth 5.6%
Theme / Subtheme Classic / Supplemental
Year 1966
Pieces 39
Availability Retired
470 LEGO 1x1, 1x2, 2x2, 2x3, 2x4 Plates
Retail $0.50
Value $50.00
Growth  9900.0%
Annual growth 5.9%