Field notes from the shop floor.
Quiet perspectives on running a modern watch-trading business. Tax, tools, marketplace and lessons we find worth writing down.
Four threads, one trade.
Each entry comes from a working watch-trading business, not a content team. We write the things we wished someone had written for us when we started.
Tax handling, invoicing schemes, accounting workflows, and the regulatory questions that come up when you run a watch business in Germany or the EU. Long-form references you can come back to.
Marketplaces, channel strategy, market dynamics. What sells where, fees and trust models, and the lessons we have collected from operating across Chrono24, eBay, and Catawiki.
How to read a reference number. Brand-specific conventions. Vintage authentication clues. Dial variants and what they signal. The vocabulary the trade actually uses.
Inventory workflows, photography setups, service tracking, return policies, and the operational habits that separate a one-person shop from a scalable trading business.
How to read a watch reference number
The reference number is the most reliable piece of information on any watch. Once you can read it, you can tell production year, case material, dial configuration and value tier in seconds. A practical guide.
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Differenzbesteuerung (§ 25a UStG) for watch dealers
The margin scheme explained for professional watch dealers. When it applies, how VAT is calculated, what your invoices must show, and the mistakes that get expensive.
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Where to sell watches: Chrono24, eBay, or Catawiki?
A working dealer's comparison of the three main European watch marketplaces. Audience, fees, what actually sells, and how to build a multi-channel strategy that does not blow up your inventory.
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Viktor runs a watch-trading business in Grünwald, Germany, and writes the journal from the same desk. Most entries here grew out of a problem he hit in the shop and could not find a useful answer to: a § 25a invoice that did not balance, a Chrono24 listing that did not perform, a vintage reference with three documented dial variants and a fourth in the workshop.
ChronoDesk is the operating system he wished existed for that work. The journal is the conversation he wished had been waiting for him in 2015. If a particular topic would help you, write to him at info@chronodesk.com.
Format, voice, suggestions.
Who writes the journal?
Viktor Siewert, founder of ChronoDesk. He runs a watch-trading business in Grünwald, Germany, and writes the journal from the same desk.How often do you publish?
New entries land when there is something substantive to say. Quality before cadence. The newest articles always sit at the top of the index.Can I suggest a topic?
Yes. Write to info@chronodesk.com with the question you wish was already answered.Is this legal or tax advice?
No. The journal is editorial reference written by a working dealer. It does not constitute legal, tax, or financial advice. Every article carries a disclaimer and a link to our full notice. Confirm specific situations with your tax advisor.How do I get notified of new entries?
Bookmark this page. The journal index lists every entry newest-first and you can filter by category.