Complete Train Set with Motor, Signals and Switch
181-1
Released: 1972 · Parts: 145 · Theme: 4.5V
Complete Train Set with Motor, Signals and Switch (181-1) is a 4.5V LEGO set released in 1972 with 145 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing 4.5V sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 48 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
1972 (54 years ago — may be retired)
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Catalog scale
145 parts listed · 48 inventory lines tracked
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Minifigures
No minifigs in inventory (brick-only or Technic set)
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Build manual
No digital manual in our catalog — check the box tab or LEGO.com
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~280 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
Related sets in this theme
Market value
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Parts in this set
48 parts · updating…
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Battery Box, Train Car with Black Base, Red Wheels and Magnets3443c02 · ×1 · Red -
Battery Cover, Train Car Roof 6 x 14699 · ×1 · Blue -
Brick 1 x 13005 · ×6 · Black -
Brick 1 x 23004 · ×4 · Yellow -
Brick 1 x 23004 · ×2 · Black -
Brick 1 x 23004 · ×4 · Blue -
Brick 1 x 43010 · ×2 · Yellow -
Brick 1 x 43010 · ×5 · Black -
Brick 1 x 63009 · ×3 · Black -
Brick 1 x 63009 · ×4 · Blue -
Brick 1 x 83008 · ×2 · Black -
Brick 2 x 2 without Inside Ridges3003a · ×1 · Black -
Brick 2 x 4 without Cross Supports3001a · ×1 · Black -
Brick 2 x 4 without Cross Supports3001a · ×2 · Yellow -
Brick Round 1 x 1 Solid Stud3062a · ×1 · Yellow -
Brick Sloped 33° 3 x 43297 · ×1 · Red -
Brick Sloped 45° 2 x 1 without Bottom Pin3040a · ×4 · Black -
Brick Sloped 45° 2 x 1 without Bottom Pin3040a · ×2 · Red -
Brick Sloped 45° 2 x 23039 · ×1 · Black -
Brick Sloped 45° 2 x 43037 · ×4 · Black -
Door 1 x 3 x 2 Left3189 · ×1 · Black -
Door 1 x 3 x 2 Right3188 · ×1 · Black -
Fence Gate 1 x 3 x 2 Base3359 · ×2 · Black -
Fence Lattice 1 x 4 x 23185 · ×4 · Red -
Motor, Train, 4.5V, 4 x 12 x 3 1/3 Type 1564c01 · ×1 · Black -
Panel, Trapezoid, Tipper End Flat with Pins, 1 x 2 Anti-studs3145 · ×2 · Red -
Plate 1 x 23023 · ×2 · Black -
Plate 2 x 23022 · ×1 · Black -
Plate 2 x 23022 · ×1 · Red -
Plate 2 x 33021 · ×2 · Red -
Plate 2 x 83034 · ×1 · Red -
Plate 2 x 83034 · ×16 · White -
Plate 4 x 63032 · ×2 · Red -
Plate 4 x 83035 · ×2 · Red -
Sticker Sheet for Set 181-1003437 · ×1 · [No Color/Any Color] -
![Train Base 6 x 12 Type 1 with Wheels and Magnets [Complete Assembly]](https://cdn.rebrickable.com/media/parts/ldraw/0/270c02.png)
Train Base 6 x 12 Type 1 with Wheels and Magnets [Complete Assembly]270c02 · ×2 · Black -
Train Base 6 x 16 Old with Magnets4178a · ×1 · Red -
Train Direction Switch - 4.5V 2 x 33218 · ×1 · Red -
Train Signal Circuit-Breaker Barupn0387 · ×1 · Red -
Train Signal Postupn0262 · ×1 · Red -
Train Wheel Spoked for Motorupn0383a · ×4 · Red -
Tyre for Train Wheel for Electric Train Motor 12V458 · ×4 · Black -
Vehicle Track, Train, Tapered Rail Curved Inside3230a · ×16 · Blue -
Vehicle Track, Train, Tapered Rail Curved Outside3229a · ×16 · Blue -
Window 1 x 1 x 1 Classic with Short Sill, No Glass3087c · ×4 · Yellow -
![Window 1 x 1 x 2, Short Lip [no Glass]](https://cdn.rebrickable.com/media/parts/ldraw/14/29c.png)
Window 1 x 1 x 2, Short Lip [no Glass]29 · ×2 · Yellow -
![Window 1 x 2 x 1, Short Lip [with Glass]](https://cdn.rebrickable.com/media/parts/ldraw/4/27cc01.png)
Window 1 x 2 x 1, Short Lip [with Glass]27c01 · ×2 · Red -
Wire with 2-Prong Connectors, 12V / 4.5V 11Lupn0257c11 · ×1 · White