Diesel Freight Train Set, battery (7720-1) is a 4.5V LEGO set released in 1980 with 428 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 3 minifigures and 101 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
1980 (46 years ago — may be retired)
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Catalog scale
428 parts listed · 101 inventory lines tracked
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Minifigures
3 in this set's inventory — verify completeness when buying used
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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.)
~721 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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Minifigures in Diesel Freight Train Set, battery
Parts in this set
101 parts · page 1 of 3 · updating…
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Bar 1 x 4 x 2 with Studs4083 · ×1 · Black -
Battery Box, Train Car with Black Base, Red Wheels and Magnets3443c02 · ×1 · Blue -
Battery Cover, Train Car Roof 6 x 14699 · ×1 · Light Gray -
Brick 1 x 13005 · ×14 · Red -
Brick 1 x 13005 · ×8 · Yellow -
Brick 1 x 23004 · ×11 · Yellow -
Brick 1 x 23004 · ×4 · Blue -
Brick 1 x 23004 · ×8 · Red -
Brick 1 x 23004 · ×2 · Black -
Brick 1 x 43010 · ×7 · Red -
Brick 1 x 43010 · ×2 · Yellow -
Brick 1 x 43010 · ×1 · Black -
Brick 1 x 63009 · ×8 · Black -
Brick 1 x 63009 · ×1 · Yellow -
Brick 2 x 2 without Inside Ridges3003a · ×2 · Red -
Brick 2 x 43001 · ×1 · Black -
Brick Sloped 33° 3 x 23298 · ×2 · Light Gray -
Brick Sloped 33° 3 x 43297 · ×11 · Light Gray -
Brick Sloped 45° 2 x 23039 · ×2 · Red -
Brick Sloped 45° 2 x 23039 · ×2 · Light Gray -
Brick Sloped 45° 2 x 43037 · ×2 · Light Gray -
Brick Sloped Inverted 45° 2 x 13665 · ×16 · Black -
Brick Special 1 x 1 with Headlight4070 · ×2 · Black -
Brick Special 1 x 1 with Headlight4070 · ×8 · Red -
Brick Special 1 x 1 x 2 with Shutter Holder3581 · ×4 · Red -
Brick Special 1 x 2 with Cable Holding Square Cutout3134 · ×1 · Red -
Brick Special 1 x 2 with Digger Bucket Arm Holder3317 · ×1 · Yellow -
Construction Vehicle Bucket Arm, Small - 2 x 6 x 23314 · ×1 · Black -
Construction Vehicle Bucket Smooth 3 x 5 x 1 & 1/33433 · ×1 · Yellow -
Door 1 x 4 x 5 Train Left4181 · ×2 · Red -
Door 1 x 4 x 5 Train Right4182 · ×2 · Red -
Fence Lattice 1 x 4 x 13633 · ×8 · Light Gray -
Glass for Train Door Lip On Top and Bottom4183 · ×4 · Trans-Clear -
Glass for Train Window 1 x 2 x 34036 · ×1 · Trans-Clear -
Glass for Train Window 1 x 4 x 34034 · ×1 · Trans-Clear -
![Hinge Plate 2 x 5 with Large Hole [Complete Assembly]](https://cdn.rebrickable.com/media/parts/ldraw/0/3149ec01.png)
Hinge Plate 2 x 5 with Large Hole [Complete Assembly]3149bc01 · ×1 · Black -
Magnet Cylindrical73092 · ×6 · Black -
Motor, Train, 4.5V 12 x 4 x 3 1/3 Type IIupn0259c01 · ×1 · Black -
Plate 1 x 13024 · ×8 · Black -
Plate 1 x 13024 · ×4 · Red -
Plate 1 x 23023 · ×2 · Black -
Plate 1 x 23023 · ×4 · Yellow -
Plate 1 x 33623 · ×4 · Black -
Plate 1 x 33623 · ×4 · Red -
Plate 1 x 43710 · ×4 · Red -
Plate 1 x 43710 · ×2 · Light Gray -
Plate 1 x 43710 · ×4 · Black -
Plate 1 x 43710 · ×5 · Yellow