LEGO Set

Message Decoder

6831-1

Released: 1989 · Parts: 34 · Theme: Space Police I

Message Decoder (6831-1) is a Space Police I LEGO set released in 1989 with 34 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Space Police I sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 1 minifigure and 18 unique part types.

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Buying checklist

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Release year

1989 (37 years ago — may be retired)
Catalog scale

34 parts listed · 18 inventory lines tracked
Minifigures

1 in this set's inventory — verify completeness when buying used
Build manual

No digital manual in our catalog — check the box tab or LEGO.com
Gray era

Pre-2004 set — may use old light/dark gray instead of bluish gray
Shipping weight (est.)

~59 g for parts inventory (excludes box/minifig packaging)
Before you buy used

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SP-Striker

6781-1 · 1989 · Space Police I

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Space Lock-Up Isolation Base

6955-1 · 1989 · Space Police I

252 parts

Mission Commander

6986-1 · 1989 · Space Police I

477 parts

Market value

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