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
ABCs Alternate Builds Classic Space Classic Space Alternate Builds Instructions Added Space Very Small Alt Build Very Small Builds 

6901 – Back B

August 25, 2023June 23, 2025 Master Builder 3933 Views

From: 6901: Mobile Lab
Name: Classic Space Rover 2 1
Instructions: View PDF | Download .io File

*Alternate Build Connection: 1980 Medium US Assortment Guide (106917/107017-US), 6870 – Back A, 6901 – Back E, 6989 – Back A, 6984: Galactic Mediator

Contributions

  1. Name, PDF and .io file submitted August 26, 2023 by: Mr.AstonishedRaccoon
  • ← 6901 – Back A
  • 6347: Monorail Accessory Track →

You May Also Like

6540 – Back B

September 9, 2026September 9, 2026 Master Builder

6016: Knight’s Arsenal

October 12, 2021October 12, 2021 Master Builder

6530 – Back B

April 4, 2020April 19, 2021 Master Builder

6542 – Back E

December 22, 2023January 1, 2024 Master Builder

4714 – Back D

March 2, 2023March 2, 2023 Master Builder

381 – Back E

July 27, 2023July 27, 2023 Master Builder

EXPLORE MORE OFFICIAL SETS

6271: Imperial Flagship
Box Story Imperial Guards Large Builds Official Sets Pirates Pirates I Pirates Sets 

6271: Imperial Flagship

January 6, 2022February 20, 2025 Master Builder

Year Released: 1992BricklinkInstructions The box reads, “THE ADVENTURES OF THE LEGO SYSTEM™  PIRATES OF THE SEA – IMPERIAL FLAGSHIP During the 18th

1558: Mobile Command Trailer
Classic Space Classic Space Sets Official Sets Small Builds Space 

1558: Mobile Command Trailer

December 18, 2021December 18, 2021 Master Builder
369: Coast Guard Station
Coast Guard LEGOLAND Medium Builds Official Sets 

369: Coast Guard Station

October 26, 2026October 26, 2026 Master Builder
1750: Renault Formula 1 Racer
Classic Town Official Sets Race Town Town Sets Very Small Builds 

1750: Renault Formula 1 Racer

July 13, 2021July 13, 2021 Master Builder
5810: Vanity Fun
Belville Belville Sets Lion Knights Official Sets Playhouse Very Small Builds 

5810: Vanity Fun

April 10, 2021April 10, 2021 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
6590: Vacation Camper
Classic Town Official Sets Small Builds Town Town Sets Traffic 

6590: Vacation Camper

July 8, 2022July 8, 2022 Master Builder
2160: Crystal Scavenger
Aquaraiders I Aquazone Aquazone Sets Medium Builds Official Sets 

2160: Crystal Scavenger

April 25, 2023April 25, 2023 Master Builder
7264: Imperial Inspection
Episode IV/V/VI Large Builds Official Sets Star Wars Star Wars Sets 

7264: Imperial Inspection

April 15, 2026April 15, 2026 Master Builder
1596: Ghostly Hideout
Castle Castle Sets Official Sets Very Small Builds Wolfpack 

1596: Ghostly Hideout

July 25, 2024July 25, 2024 Master Builder
1969-2: Space Value Pack
Bonus/Value Packs Classic Space Classic Space Sets Duplicate Set Number Official Sets Small Builds Space 

1969-2: Space Value Pack

January 29, 2025January 29, 2025 Master Builder
7252: Droid Tri-Fighter
Episode III Medium Builds Official Sets Star Wars Star Wars Sets 

7252: Droid Tri-Fighter

March 3, 2023November 12, 2024 Master Builder
8044: Universal Pneumatic Set
Medium Builds Official Sets Technic Technic Sets 

8044: Universal Pneumatic Set

August 23, 2024August 23, 2024 Master Builder
6871: Star Patrol Launcher
Classic Space Classic Space Sets Official Sets Small Builds 

6871: Star Patrol Launcher

September 27, 2019September 30, 2019 Master Builder
6212: X-wing Fighter
Episode IV/V/VI Large Builds Official Sets Star Wars Star Wars Sets 

6212: X-wing Fighter

February 1, 2024February 1, 2024 Master Builder
1590-2: ANWB Breakdown Assistance
Classic Town Large Builds Official Sets Town Town Sets Traffic 

1590-2: ANWB Breakdown Assistance

October 22, 2021October 22, 2021 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.