GPT Watch Collector Research
Independent · Dated · Source-led
Watch Market Research
What explains a price gap? How much does condition matter? Dated studies of auction results, dealer asks, ownership costs and liquidity, to help collectors read the market with more context.
Independent collector research. Public auction and dealer data, interpreted through disclosed holdings.
Not investment advice
Research framework
01
Auction results and dealer asks, with premium treatment and venue noted.
02
Buyer depth, venue effects, spreads and time-to-exit.
03
Scholarship, relaunches, signatures, anniversaries and supply.
04
Condition, attribution, service, FX and thin-market risk.
Featured report · GWC-2026-002
GWC-2026-002
Market Research
How era, configuration and venue shape Daniel Roth prices, with auction comparisons, retail discounts and the limits of a thin market.
Published September 6, 2026 · Price data as of September 11, 2026 · 9 min
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Newest first
GWC-2026-003
How subject, metal, edition size and workshop attribution affect UN enamel prices, and why a shared craft does not imply a shared valuation.
Published September 6, 2026 · Data September 4, 2026 · 10 min
GWC-2026-002
How era, configuration and venue shape Daniel Roth prices, with auction comparisons, retail discounts and the limits of a thin market.
Published September 6, 2026 · Data September 11, 2026 · 9 min
GWC-2026-001
A price study of founder-era and modern Andersen references, including retail-to-secondary gaps, documentation and the sparse 1884 market.
Published September 6, 2026 · Data September 5, 2026 · 9 min
| Report | Date | Title | Rating | Category | Data as of | Coverage | Read |
|---|---|---|---|---|---|---|---|
| GWC-2026-003 | September 6, 2026 | Ulysse Nardin Cloisonné Enamel: Prices, Provenance and the Donzé Question How subject, metal, edition size and workshop attribution affect UN enamel prices, and why a shared craft does not imply a shared valuation. | Price Study | September 4, 2026 | Ulysse Nardin | 10 min | |
| GWC-2026-002 | September 6, 2026 | Daniel Roth: A Price Map of Four Eras How era, configuration and venue shape Daniel Roth prices, with auction comparisons, retail discounts and the limits of a thin market. | Market Research | September 11, 2026 | Daniel Roth · Breguet | 9 min | |
| GWC-2026-001 | September 6, 2026 | Andersen Genève: Which Pieces Carry the Value, and the Succession Question A price study of founder-era and modern Andersen references, including retail-to-secondary gaps, documentation and the sparse 1884 market. | Brand Valuation | September 5, 2026 | Andersen Genève · Patek Philippe | 9 min |
Important disclaimer
All research on this site is the personal opinion of an individual collector, based on public auction and dealer data as of the date stated in each report. It is not investment, financial, legal or tax advice and not a solicitation to buy or sell any watch. Prices can be wrong or superseded. Watches are illiquid and condition-sensitive, and past prices do not predict future prices. Analyst holdings are disclosed in each report. No brand, dealer or auction house pays for or reviews these reports.
