Beginner
≈ 2 h 15 minSuggested range1 h 15 min – 3 h 30 min
Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗
Creator · SET 31174
Retro Telephone
A rotary telephone brings a 1960s touch to the desk. A handset, flexible cord and spring return add a small mechanical aspect to the decorative build.
- Pieces
- 383
- Release year
- 2025
- Theme
- Creator
- Set number
- 31174
- LEGO recommended age
- 8+
- LEGO retail price · Italy
- 29.99 €
Available at LEGO Italy when checked on 23 October 2026. Availability can change. Check the store for the latest information.
Retail price reported by the LEGO source for the stated market. Check the store for current price and availability; this does not establish the launch price. LEGO ↗ · Reference checked on 23 October 2026
Official English name verified at: LEGO English catalogue ↗ · Checked on 24 October 2026.
TIME TO BUILD
How long does it take to build Retro Telephone?
A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.
Editorial model estimate · no verified measured building time
Intermediate
≈ 1 h 30 minSuggested range45 min – 2 h 15 minExperienced
≈ 1 hSuggested range30 min – 1 h 30 minBased on one person building the set for the first time, following the original instructions and using numbered bags where supplied. Includes normal piece-finding and minor adjustments; excludes long breaks, filming, dismantling and modifications. Sources may use different methods. This range is neither a statistical interval nor a limit: your build may take less or more time.
How we estimate times · sources and method
A compact body, dial and spring function. Covers the main telephone and accessories, not all three alternatives. The three central durations are model-specific editorial assessments. Planning ranges extend approximately from 65% to 145%, rounded to quarter-hours; they are not measured experience-level averages or guaranteed limits.
Sources do not always specify the builder’s experience. The three experience bands are our editorial assessment, based on the complexity of the set and individual accounts where available.
- LEGO Italy · Retro Telephone ↗
This source documents the model’s features and components, not a timed build. No sufficiently verifiable individual building-time report has been identified for this set.
- LEGO building instructions · Retro Telephone ↗
Set-specific instructions checked against the set number, piece count and year. The duration is an editorial assessment based on piece count, construction type, mechanisms and detail.
Checked: 23 ottobre 2026 · Method v1.0 · Limited reports; not a statistical average.
BUILT BY THE COMMUNITY
Yours could be the first building time.
0 reviewed solo building times.
No solo building times have been reviewed yet. You can still find editorial estimates under Suggested times.
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How much display space does it need?
Model or component measured by LEGO
- Height
- ≈ 7 cm
- Width
- ≈ 15 cm
- Depth / length
- ≈ 11 cm
These measurements refer to the model or component in the original specification below. Other builds, poses or arrangements may need additional space.
Check your shelf space
Which model was measured? · original Italian specification
Dimensioni: un set giocattolo nostalgico ricostruibile di 383 pezzi contenente un telefono a disco giocattolo degli anni ’60 che misura 7 cm di altezza, 15…Approximate assembled-model measurements, not packaging dimensions. Allow extra room for handling, moving parts and the display stand. The comparison uses the measured model’s overall footprint, allows a 90° rotation and does not assess stability or shelf load. Source LEGO ↗ · 2026-10-29
BEYOND THE BRICKS
Did you know?
Inside the set
A spring-loaded return
The telephone has a removable receiver and a spring function that responds when it is replaced.
LEGO sourceNotes beside the phone
A buildable pencil and customisable notepad accompany the main model, which rebuilds into two other versions.
LEGO sourceBeyond the set
The stories, places and inventions behind your build.
Three days after the patent
Bell received his telephone patent on 7 March 1876. His successful message to his assistant Watson followed three days later.
Read the full story
Bell received his telephone patent on 7 March 1876; Watson heard the famous successful message three days later. Smithsonian distinguishes formal recognition from a working communication test. Both document and experiment belong to the invention’s history.
Before modern handsets
One 1876 telephone at the Smithsonian is a large box with an iron diaphragm and electromagnets, far removed from a rotary phone.
Read the full story
The November 1876 Boston–Salem demonstration phone includes an iron diaphragm, two electromagnets and a horseshoe permanent magnet. Preserved by Smithsonian, it exposes components less visible in later phones. Voice transmission can be connected directly with membrane movement and magnetic effects through this historical object.
Expanded stories updated on 29 October 2026
Written by HowLongToBuild · Sources are linked with each story · Checked on 23 October 2026. Historical facts and story details refer to the context described.
THE COMMUNITY’S EXPERIENCE
What was it like to build?
Three separate scores from 1 to 10. For difficulty, 1 means very easy and 10 means very difficult.
No approved ratings yet. Scores are never generated by this site or inferred from the recommended age.
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Building tips from the community
Specific steps, useful checks and sticking points. Contributions appear after moderation, in their original language. Do not upload instruction pages or personal contact details.
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A soundtrack for your build
· Selected for the subject and atmosphere
Small acoustic motifs and a playful character accompany inventive shapes and figures. The aim is curiosity and lightness rather than simply replaying a character’s theme tune.
OUR PICK
The Red Book
Penguin Cafe
Rhythmic and livelyEditorial suggestions, not official soundtracks for the set. External services may require an account or subscription; editions and availability can vary by country. Suggest another soundtrack →
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YOUR NEXT BUILD
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