Anthony Marquié and Grégoire Rossier are the authors of the Only and Story collections of reference books about the most iconic watches. Both have scientific backgrounds: Anthony trained as an aeronautical engineer - although he soon turned to an international career in finance - and Grégoire has a PhD in biology with a specialization in bioinformatics. Passionate about watches and collectors' watches, they have dedicated a significant part of their activities to this sector for many years, until they created the consulting company WATCHFID ([...] in 2020, whose services are entirely dedicated to collectors of vintage and prestige watches. Tiffany To is currently a Senior International Specialist, auctioneer and Head of Sale at Phillips Fine Watches, having started in the auction industry over 8 years ago. Vintage watches, particularly vintage Rolex, are a lifelong passion of hers. The scholarship, history and discovery of the unknown makes every day in this horological world an interesting and fascinating one.