12V Locomotive (727-1) is a 12V LEGO set released in 1977 with 134 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing 12V sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 30 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
1977 (49 years ago — may be retired)
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Catalog scale
134 parts listed · 30 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.)
~287 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
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Market value
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Parts in this set
30 parts · updating…
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Brick 1 x 13005 · ×8 · Red -
Brick 1 x 13005 · ×4 · Trans-Clear -
Brick 1 x 23004 · ×2 · Black -
Brick 1 x 2 x 2 without Bottom Tube with Train Window Print772pr0001 · ×4 · Trans-Clear -
Brick 1 x 43010 · ×2 · Red -
Brick 1 x 63009 · ×8 · Red -
Brick 1 x 63009 · ×2 · Trans-Clear -
Brick 1 x 8 with Bottom Tubes and 3 Lowered Cross Supports3008b · ×4 · Red -
Brick 2 x 4, 12V with Power Pickups for Train Motor and Cross-cut Pins429c02 · ×2 · Black -
Brick 2 x 83007 · ×2 · Red -
Brick Sloped 33° 3 x 23298 · ×2 · Light Gray -
Brick Sloped 45° 2 x 33038 · ×4 · Trans-Clear -
Brick Special 1 x 1 x 2 with Shutter Holder3581 · ×8 · Black -
![Engine - Smooth, Small 1 x 2 Side Plate [No Axle Holders]](https://cdn.rebrickable.com/media/parts/ldraw/7/3475a.png)
Engine - Smooth, Small 1 x 2 Side Plate [No Axle Holders]3475a · ×2 · Light Gray -
Motor, Train, 12V 12 x 4 x 3 1/3 Type II with Three Side Holesupn0274c01 · ×1 · Black -
Plate 1 x 23023 · ×4 · Red -
Plate 1 x 23023 · ×22 · Black -
Plate 1 x 43710 · ×2 · Yellow -
Plate 1 x 83460 · ×4 · Yellow -
Plate 1 x 83460 · ×4 · Black -
Plate 2 x 33021 · ×4 · Red -
Plate 2 x 33021 · ×4 · Yellow -
Plate 2 x 43020 · ×6 · Black -
Plate 6 x 163027 · ×1 · Black -
Sticker Sheet for Set 727-13811stk · ×1 · [No Color/Any Color] -
Train Base 6 x 22 with Magnetsupn0278c01 · ×1 · Black -
Train Brick 2 x 4 x 1 1/3 Sliding Wheel Block - Type B with Ledgeupn0184b · ×2 · Black -
Train Wheel Spoked for Motorupn0383a · ×8 · Black -
Tyre for Train Wheel for Electric Train Motor 12V458 · ×8 · Black -
Window 1 x 2 x 2 Shutter3582 · ×8 · Black