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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryRetail & CommerceRetailBaselJean-Paul Bach
Jean-Paul Bach Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Jean-Paul Bach trades in stamps and coins and provides appraisals of collections. The auction house holds regular remote and live auctions and publishes books on philately.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Retail
✓ Offered5
Stamp auctions
Remote auctions and online live auctions for stamps, with auction catalogue, lot overview, bid slips and live access.
Stamp and coin sales
Personal, free advice on selling stamp or coin collections, also directly at your home.
Auction catalogues
Free request of auction catalogues, with selection of preferred collecting areas and dispatch of the documents.
Webshop for philatelic lots
Webshop with offers from the ongoing auction and individual lots available for purchase.
Philatelic books
Books on philatelic topics, available directly from Jean-Paul Bach.
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4.1/5

Jean-Paul Bach

Trust & reputation

ranQ Trust Score of Jean-Paul Bach: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of November 2026

Jean-Paul Bach scores 68.3 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.73.124%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.35.310%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.95.08%
Jean-Paul Bach scores 78.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Jean-Paul Bach scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
Jean-Paul Bach scores 28.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Jean-Paul Bach reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 3 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

Knowledge

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Location

Schöllenenstrasse 2
4054 Basel
Opening hours
Mon
08:00 - 12:00, 14:00 - 16:30
Tue
08:00 - 12:00, 14:00 - 16:30
Wed
08:00 - 12:00, 14:00 - 16:30
Thu
08:00 - 12:00, 14:00 - 16:30
Fri
08:00 - 12:00, 14:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-115.844.088
Founded
2010 · 16 years
Last commercial register change
March 2, 2017
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BSBasel
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
67.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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