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6057 LEGO Black Knights Sea Serpent thumbnail image

6057 LEGO Black Knights Sea Serpent
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6057 LEGO Black Knights Sea Serpent
  • Sea Serpent thumbnail
  • Sea Serpent thumbnail
  • Sea Serpent thumbnail
  • Sea Serpent thumbnail
  • Sea Serpent thumbnail
  • Sea Serpent thumbnail

LEGO 6057 Sea Serpent is a vintage Castle set from 1992 valued at $406 for new and sealed sets, up 2697% from an original retail price of $14.50. Annual appreciation has averaged 7.63% since release. On the used market, values range from $64 to $90 based on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Sea Serpent since January 2018. Very high accuracy
LEGO 6057 Sea Serpent is a Castle Black Knights set released in 1992, containing 126 pieces and 5 minifigures. The build is a dragon-prowed galley with a single square sail printed with the Black Knights emblem, side-mounted shields, and working oars; it is also known as Black Knight’s Ship. The lineup includes three Black Knights soldiers and two Black Falcons soldiers, the latter being the final Black Falcons minifigures to appear in a regular retail set of the era. Accessories include swords, pikes, and shields with the Black Knights crest.

A new and sealed Sea Serpent is currently valued at around $406, with annual growth of 5.1% that is expected to level off to around 3.9% in the coming year. The average used price is $75 for those in good overall condition. Based on current trends, this set could be valued near $414 within the next year. The 5 included minifigs account for approximately 56% of the set's total value.
All regions

For Sale (New/Sealed)

 (US) Castle: Sea Serpent (6057) VINTAGE NEW IN SEALED BOX
BrickEconomy Choice
$360.00
(US) System 6057 NEW Sea Serpent Set 1992 Complete $380.00
-6.3%
(HU) brand new, but box has been opened on 1 side. Content untouched, brand new inside. $387.98
-4.3%
(US) Amazon listing for Sea Serpent $425.85
+5.0%
(DE) LEGO System 6057 - Sea Serpent | Legoland | EOL 1994 | Sealed | New + Original Packag... $472.60
+16.5%
All regions

For Sale (Used)

 (FR) Used - complete with instructions, but no box $63.95
(CA) Used - Vintage Lego 90s Sets: Sea Serpent 6057 Ship Trans Carrier Airplane 6375 READ
$78.60
(NL) Used - Parts are in good condition, prints are good, sail is little discolored (but o... $80.74
(IT) Used - Sea Serpent - LEGO - 6057 - NO BOX - Year 1992 - USED
$82.21
(NL) Used - Complete set but in used condition (1992) with instructions and sail. No box. $86.51

Sets in Castle / Black Knights

6085 Black Monarch's Castle

Theme / Subtheme Castle / Black Knights
Year 1988
Pieces / Minifigs 702 / 12
Availability Retired
6085 LEGO Black Knights Black Monarch's Castle
Retail $67.95
Value $2,929.35
Growth  +4211.0%
Annual growth 10.3%

6086 Black Knight's Castle

Theme / Subtheme Castle / Black Knights
Year 1992
Pieces / Minifigs 588 / 12
Availability Retired
6086 LEGO Black Knight's Castle
Retail $84.99
Value $4,174.31
Growth  +4811.5%
Annual growth 6.4%

6059 Knight's Stronghold

Theme / Subtheme Castle / Black Knights
Year 1990
Pieces / Minifigs 224 / 5
Availability Retired
6059 LEGO Black Knights Knight's Stronghold
Retail $21.99
Value $598.61
Growth  +2622.2%
Annual growth 4.9%

1547 Black Knights Boat

Theme / Subtheme Castle / Black Knights
Year 1993
Pieces / Minifigs 58 / 2
Availability Retired
1547 LEGO Black Knights Boat
Retail $4.25
Value $295.33
Growth  +6848.9%
Annual growth 9.4%

6018 Battle Dragon

Theme / Subtheme Castle / Black Knights
Year 1990
Pieces / Minifigs 56 / 2
Availability Retired
6018 LEGO Black Knights Battle Dragon
Retail $4.49
Value $189.15
Growth  +4112.7%
Annual growth 7.5%

1888 Black Knights Guardshack

Theme / Subtheme Castle / Black Knights
Year 1992
Pieces / Minifigs 49 / 2
Availability Retired
1888 LEGO Black Knights Guardshack
Retail $3.49
Value $182.06
Growth  +5116.6%
Annual growth 12.3%

1491 Dual Defender

Theme / Subtheme Castle / Black Knights
Year 1992
Pieces / Minifigs 48 / 2
Availability Retired
1491 LEGO Black Knights Dual Defender
Retail $3.49
Value $160.00
Growth  +4484.5%
Annual growth 6.0%

6034 Black Monarch's Ghost

Theme / Subtheme Castle / Black Knights
Year 1990
Pieces / Minifigs 46 / 2
Availability Retired
6034 LEGO Black Knights Black Monarch's Ghost
Retail $7.25
Value $298.23
Growth  +4013.5%
Annual growth 7.9%

1971 Battering Ram

Theme / Subtheme Castle / Black Knights
Year 1993
Pieces / Minifigs 36 / 1
Availability Retired
1971 LEGO Black Knights Battering Ram
promotional
Value $236.70
Annual growth 6.7%

6009 Black Knight

Theme / Subtheme Castle / Black Knights
Year 1992
Pieces / Minifigs 24 / 1
Availability Retired
6009 LEGO Castle Black Knight
Retail $3.25
Value $109.36
Growth  +3264.9%
Annual growth 7.2%

1624 King's Archer

Theme / Subtheme Castle / Black Knights
Year 1993
Pieces / Minifigs 22 / 1
Availability Retired
1624 LEGO Black Knights King's Archer
Retail $2.49
Value $83.43
Growth  +3250.6%
Annual growth 11.2%

1917 King's Catapult

Theme / Subtheme Castle / Black Knights
Year 1993
Pieces / Minifigs 22 / 1
Availability Retired
1917 LEGO Black Knights King's Catapult
Retail $1.99
Value $107.17
Growth  +5285.4%
Annual growth 9.3%

2890 Stone Bomber

Theme / Subtheme Castle / Black Knights
Year 1998
Pieces / Minifigs 22 / 1
Availability Retired
2890 LEGO Black Knights Stone Bomber
promotional
Value $70.25
Annual growth 9.1%

My Collection

Sea Serpent Reviews

28 reviews
4.8
Collectors
Investors
Steve's LEGO Blog
“The Falcon’s in this set are merely antagonists and the only thing to really note here is the unusual grey helm on the archer and the grey trousers on both of them... As these were the last Falcon’s to be released (ever) they could be the final warriors fleeing the land.”
Full review at legosteveblog.blogspot.com
Playing with Bricks
“This set comes highly recommended. Five figures for the price (at least back when you could buy the set in stores) was a steal. For adults, the set does offer a few unique pieces (and a great chance to army build) but there isn't a lot else you can build with the set... More itself.”
Full review at playingwithbricks.blogspot.com

About Castle Black Knights

The Black Knights were a faction of the Castle theme introduced in 1998. A total of 13 sets were released containing 3 major castles. Most of the castles and fortification where colored black and their symbol was a wyvern dragon. While The Black Knights subtheme was discontinued after 1994 the crest was still used in later sets.

Black Knights consists of 14 sets that ran from 1988 to 1998. As of today, 6086 Black Knight's Castle is the most valuable Black Knights set with an estimated new/factory sealed value of $4,174.
Summary
Castle Black Knights Sea Serpent set 6057 was released in March 1992, retailing for $15, but has since been retired. New, unopened Sea Serpent sets are valued at $406, while used sets can be found for $75.
Read more
The Black Knights rule the seas with their mighty dragon ship! Equipped with sail, shields, and crew, they strike from the water to defend their castle stronghold.
Description provided by LEGO©