LEGO Sub Orbital Guardian (6878-1) is a 1991 set from the Blacktron II theme with 75 pieces.
Why collectors care
Sub Orbital Guardian (6878-1) is part of the LEGO collecting graph through Blacktron II from 1991, with 75 pcs. LEGO collectors usually browse by theme, set number, release era, and display value, so this page keeps those paths close.
Collector summary
Decide where this fits.
Sub Orbital Guardian is a lego collectible connected to LEGO and Blacktron II. Useful collector signals include release year 1991, set number 6878-1, and 75 pcs. Blacktron II has 14 catalogued releases on GrailHub, making this page a route into completion, variants, and nearby objects.
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Collector notes
Sub Orbital Guardian (6878-1) is a LEGO Blacktron II release from 1991 with 75 pcs. GrailHub tracks it as part of the LEGO collecting lane, where set number, theme, release year, piece count, and display appeal all help collectors understand how the set fits on a shelf.
LEGO collectors often browse by theme first, so this page links back into Blacktron II, LEGO, and related LEGO objects. Use those links to compare nearby releases, find other display sets, or move from a single set into the wider theme.
Related LEGO entries currently connected to this object include Blacktron Super Vehicle (Value 3-Pack), Super Model Building Instruction, and Galactic Scout. These links make it easier to keep exploring without jumping back to a generic search page.
Series context
Blacktron II
Blacktron II groups related lego entries from LEGO, so collectors can move from this object into nearby releases instead of treating it as a standalone record.
- Catalogued here
- 14 objects
- Release span
- 1991-1993
Nearby in this lane
Collection tracking
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Complete
Quick facts
- Set number
- 6878-1
- Release year
- 1991
- Piece count
- 75 pcs
- Theme / series
- Blacktron II
- Brand
- LEGO
- Category
- LEGO
Market snapshot
BrickEconomy valuation
- Retail price
- $7.99
- New/sealed value
- $275.74
- Used value
- $33.52
- Annual growth
- 2.5%
- 12-month growth
- 2.2%
- 2-year forecast
- $317.86
- 5-year forecast
- $367.94
Market data from BrickEconomy · Last updated Jul 30, 2026
Market data is informational and may be incomplete. GrailHub is not a marketplace or appraisal service.
Lifecycle
Retired
Released
Mar 1, 1991
Availability
Retail
Original retail prices
Minifigures
1 included
EAN
5702010968787
UPC
042884068783
Recent new/sealed events
Recent used events
Data source
- Source
- Rebrickable
- Source ID
- 6878-1
- Source URL
- View on Rebrickable
LEGO catalogue data provided by Rebrickable.
Related objects
More from Blacktron II
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