Skip to content
Back of the Box Builds

Back of the Box Builds

LEGO Alternate Builds!

  • SETS
    • Adventurers
    • Aquazone
    • Belville
    • BATMAN™
    • BIONICLE
    • Building Set with People
    • Castle
    • Duplo
    • Fabuland
    • Harry Potter
    • Holiday and Event
    • LEGOLAND
    • Model Team
    • Pirates
    • Space
    • Star Wars
    • Technic
    • Train
    • Town
    • Universal Building Set
    • Western
    • More Sets
    • Misc
  • USEFUL LINKS
    • Submit Instructions!
    • New Instructions
    • New Official Sets
    • New Alternate Builds
    • Minifigs
    • Very Small Builds
    • Small Builds
    • Medium Builds
    • Large Builds
    • Extra Large Builds
    • How BOTBB was Built
  • THIS IS AN INDEPENDENT SITE NOT AUTHORIZED OR SPONSORED BY THE LEGO GROUP
Concepts and Prototypes Grey:tron Grøntrøn Space 

Greytron

February 11, 2025February 11, 2025 Master Builder 8551 Views

Misc
Theme: Greytron (Not Official)

BrickJournal: Issue 6 Volume 2 – Page 42
TwoMorrows Publishing
Photo Credit: Niels Milan Pedersen’s personal LEGO archives

LEGO® Space: 1978-1992 – Page 156
Published: 2023
By: Tim Johnson
Dark Horse Books

Name: TBD
Submitted By: USER
Instructions:

  • ← 6713 – Back B
  • Aquadome →

You May Also Like

6874 – Back D

November 6, 2023November 6, 2023 Master Builder

1968 – Back A

November 21, 2023December 3, 2023 Master Builder

924 – Back A

January 25, 2022September 11, 2023 Master Builder

1580 – Back B

July 12, 2021July 12, 2021 Master Builder

6951 – Side R

September 21, 2019October 25, 2021 Master Builder

6985 – Back C

September 28, 2019November 18, 2021 Master Builder

EXPLORE MORE OFFICIAL SETS

6933: Spectral Starguider
Blacktron II Blacktron II Sets Jørn Thomsen Medium Builds Official Sets Space 

6933: Spectral Starguider

April 13, 2020February 11, 2025 Master Builder

Year Released: 1991Designer: Jørn ThomsenBricklinkInstructions *Alternate Build Connection: RTron

6801: Moon Buggy
Classic Space Classic Space Sets Official Sets Very Small Builds 

6801: Moon Buggy

September 22, 2019September 28, 2019 Master Builder
6376: Breezeway Cafe
Classic Town Food and Drink Medium Builds Official Sets Town Town Sets 

6376: Breezeway Cafe

February 3, 2021February 3, 2021 Master Builder
891: Two-Man Scooter
Classic Space Classic Space Sets Official Sets Small Builds Space 

891: Two-Man Scooter

March 15, 2024March 15, 2024 Master Builder
6086: Black Knight’s Castle
Black Knights Castle Castle Sets Extra Large Builds Niels Milan Pedersen Official Sets 

6086: Black Knight’s Castle

October 11, 2021July 29, 2023 Master Builder
6755: Sheriff’s Lock-Up
Cowboys Medium Builds Official Sets Western Western Sets 

6755: Sheriff’s Lock-Up

July 3, 2024February 18, 2025 Master Builder
6813: Galactic Chief
Jørn Thomsen Official Sets Space Space Police II Space Police II Sets Very Small Builds 

6813: Galactic Chief

April 8, 2020July 29, 2023 Master Builder
5918: Scorpion Tracker
ABCs Adventurers Adventurers Sets Desert Official Sets Very Small Builds 

5918: Scorpion Tracker

February 8, 2025February 12, 2025 Master Builder
6713: Grip-n-Go Challenge
Large Builds Official Sets Race Town Town Sets 

6713: Grip-n-Go Challenge

February 10, 2025February 10, 2025 Master Builder
8926: Toa Undersea Attack
BIONICLE BIONICLE Sets Large Builds Official Sets Playsets 

8926: Toa Undersea Attack

March 3, 2026March 3, 2026 Master Builder
6989: Mega Core Magnetizer (Multi Core Magentizer)
Box Marketing Blurb Extra Large Builds Jørn Thomsen M:Tron M:Tron Sets Official Sets 

6989: Mega Core Magnetizer (Multi Core Magentizer)

September 15, 2019February 18, 2026 Master Builder
5847: Surfers’ Paradise
Belville Belville Sets Lion Knights Medium Builds Official Sets Recreation 

5847: Surfers’ Paradise

April 2, 2025April 2, 2025 Master Builder
6854: Alien Fossilizer
ABCs Exploriens Exploriens Sets Official Sets Small Builds Space 

6854: Alien Fossilizer

July 15, 2022March 22, 2025 Master Builder
6034: Black Monarch’s Ghost
Black Knights Castle Castle Sets Official Sets Very Small Builds 

6034: Black Monarch’s Ghost

January 16, 2022January 16, 2022 Master Builder
6422: Telephone Repair
Official Sets Town Town Jr Town Sets Traffic Very Small Builds 

6422: Telephone Repair

July 28, 2020July 28, 2020 Master Builder
7783: The Batcave: The Penguin and Mr. Freeze’s Invasion
Batman I BATMAN™ BATMAN™ Sets Extra Large Builds Official Sets 

7783: The Batcave: The Penguin and Mr. Freeze’s Invasion

March 27, 2026March 27, 2026 Master Builder

BOXES

INSTRUCTIONS

FAVORITES

MINIFIGS

About This Site

Logo
There were once pictures of additional LEGO® builds on the back of set boxes. Written on the boxes was typically something about the endless building possibilities, "Build any of these exciting models with this set!" There were no instructions for these alternate builds, until now.

Sets

  • Adventurers
  • Aquazone
  • BATMAN
  • Bionicle
  • Belville
  • Building Set with People
  • Castle
  • Duplo
  • Fabuland
  • Harry Potter
  • Holiday and Event
  • LEGOLAND
  • Model Team
  • Pirates
  • Space
  • Star Wars
  • Technic
  • Train
  • Town
  • Universal Building Set
  • Western
  • More Sets
  • Misc

Useful Links

  • Submit Instructions!
  • New Instructions
  • New Official Sets
  • New Alternate Builds
  • Minifigs
  • Very Small Builds (<35 pcs)
  • Small Builds (<100 pcs)
  • Medium Builds (<200 pcs)
  • Large Builds (<400 pcs)
  • Extra Large Builds (>400 pcs)
  • How BOTBB was Built

In Honor of 1526

The classic space set that never was.

Copyright © 2026 Back of the Box Builds. All rights reserved. LEGO® is a trademark of the LEGO Group of companies which does not sponsor, authorize, or endorse this site.