How many pieces are in the Supplementary Set?

Supplementary Set contains 52 pieces.

What age is the Supplementary Set recommended for?

This set is recommended for ages 18+.

When was the Supplementary Set released?

Supplementary Set was released in 1979.

🏛 Expert Builder

Set #878

Supplementary Set

Name: Supplementary Set
Brand: LEGO
SKU: 878-1

The Supplementary Set is a fascinating glimpse into early LEGO Technic.

🏆 Best For: Ideal for LEGO Technic enthusiasts and vintage collectors ⏱ 0.5 hr build 🧩 52 pcs

★★★☆☆ 3.6

Fans appreciate this set for its historical value and contribution to early LEGO Technic building. However, some find it less appealing as a standalone set due to its small size and limited building options.

MSRP

$4.50

Best Price

$29.99

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📝 Our Take

The Supplementary Set is a fascinating glimpse into early LEGO Technic. Released in 1979, this small set provides additional parts to enhance other Expert Builder models, allowing for more complex and functional creations.

This set is perfect for vintage LEGO collectors and Technic enthusiasts. It offers a tangible connection to the roots of Technic building and demonstrates the ingenuity of early LEGO engineering.

Skip this if you're looking for a complete, standalone building experience. As a supplementary set, it's intended to complement other sets, not to be a primary model itself.

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🧱 Building Experience

🧩

Pieces

⏱

0.5h

Build Time

📊

Beginner

Difficulty

Build Highlights:

Simple assembly of basic Technic elements
Focus on understanding fundamental Technic connections
Demonstrates early Technic building principles
Offers opportunities to expand other Technic models

📈 Investment Analysis

→ Price stable

B-

Investment Grade

⏳ Active

The Supplementary Set, while small, holds moderate investment potential due to its age and rarity. As a vintage set from the early days of LEGO Technic, it appeals to collectors interested in the history of the theme. Its value is primarily driven by its age and condition, rather than piece count or exclusive elements. While not a guaranteed high-return investment, its limited availability and historical significance could lead to gradual appreciation over time.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

⚖ Compare Similar Sets

Technic Gear Set

Expert Builder • 58 pcs

Compared to modern Technic sets, the Supplementary Set offers a more basic and fundamental building experience. While lacking the complexity of newer models, it provides a glimpse into the origins of Technic engineering. Collectors interested in vintage LEGO may prefer this set for its historical significance, while those seeking advanced building techniques may opt for more recent Technic sets.

📦 Full Parts Inventory - 10 unique parts • 52 total pieces

Technic Axle and ...

Part #: 3651 12× Light Gray

Technic Engine Pi...

Part #: 3652 2× Light Gray

Technic Pin witho...

Part #: 3673 12× Light Gray

Technic Axle 2

Part #: 3704 4× Black

Technic Axle 4

Part #: 3705 4× Black

Technic Axle 6

Part #: 3706 2× Black

Technic Axle 8

Part #: 3707 4× Black

Technic Axle 12

Part #: 3708 2× Black

Technic Bush

Part #: 3713 8× Light Gray

Technic Axle 10

Part #: 3737 2× Black

This set is a good source of early Technic parts, particularly the Light Gray connectors and pins. These elements are useful for builders looking to replicate vintage Technic models or experiment with basic mechanical functions.

🛒 Where to Buy

💎 Notable Parts

Light Gray Technic Axle and Pin Connector (12x) $1.20

Light Gray Technic Pin without Friction Ridges Lengthwise (12x) $1.20

Light Gray Technic Bush (8x) $0.80

Black Technic Axle 8 (4x) $0.40

Est. BrickLink Part Value

$3.60

💡 MOC Potential

🚗 Small-scale Technic vehicles (cars, motorcycles)

🤖 Basic robotic arms or mechanisms

🌳 Simple mechanical models of natural elements (e.g., windmill)

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Inventory Statistics

Unique Parts

Total Pieces

Minifigures

Inventory Version: 1

Vintage Technic!
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Supplementary Set