Editorial

Reference guides, collecting advice and market context to help you choose your next watch.

Audemars Piguet Royal Oak Minute Repeater Supersonnerie 26591TI.OO.1252TI.03 in titanium with a smoked grey Grande Tapisserie dial
Audemars Piguet Supersonnerie and Grande Complication: Minute Repeaters Explained
|Filip Biczak
How Audemars Piguet's Supersonnerie works and every watch that uses it: the Royal Oak Minute Repeater Supersonnerie 26591, the Royal Oak Concept 26577, the Code 11.59 26395 and Grande Sonnerie... Read more...
Rolex Sea-Dweller 126600 in Oystersteel with red Sea-Dweller text, 1,220 m depth rating, Cyclops date and black Cerachrom bezel
Rolex Submariner vs Sea-Dweller vs Deepsea: Differences and Prices
|Filip Biczak
How the Rolex Submariner, Sea-Dweller and Deepsea differ in 2026: Rolex's depth ratings, case sizes, helium escape valve, Cyclops, calibres and US list prices for every current reference, how to... Read more...
Rolex Day-Date 40 228348RBR in yellow gold with a factory bezel of 48 round brilliant-cut diamonds, champagne dial and President bracelet
Rolex Diamond Bezels: Factory vs Aftermarket, Models and Prices
|Filip Biczak
Every Rolex with a factory diamond bezel in 2026: Rolex's stone counts and US list prices for the Day-Date, Datejust, Lady-Datejust, Daytona, Land-Dweller and Oyster Perpetual, round brilliant (RBR) vs... Read more...
Rolex Sky-Dweller 336934 in Oystersteel and white gold with a mint green dial, white gold fluted bezel and Oyster bracelet
Green Dial Rolex: Sky-Dweller, Day-Date, Datejust and Submariner References
|Filip Biczak
Every green dial Rolex in the 2026 catalogue: the mint green, bright green and blue-green Sky-Dweller, green, green ombré and olive Day-Dates, olive, mint and green ombré Datejusts and the... Read more...
Rolex GMT-Master II 40 mm 126710GRNR in Oystersteel with grey and black Cerachrom bezel on an Oyster bracelet, a reference authenticated by its crystal etching, rehaut serial and warranty card
How Brand Authentication Technology Works in 2026 and What It Does to a Watch's Price
|Filip Biczak
How Rolex, Patek Philippe and Audemars Piguet authenticate a watch in 2026, from crystal etchings and rehaut serials to warranty cards, archive extracts, owner accounts and certified pre-owned, what a... Read more...
Rolex Submariner 41 mm 126610LN in Oystersteel with black dial and bezel, a reference whose Rolex Service Centre record is checked by serial number
How to Verify a Watch's Service History, Brand by Brand: Rolex, Audemars Piguet and Patek Philippe
|Filip Biczak
How to verify a Rolex, Audemars Piguet or Patek Philippe service record: what the documents contain, what a brand service replaces, independent versus brand service, how to read a recently... Read more...
Rolex Sky-Dweller 336934 in Oystersteel with white gold fluted bezel and blue dial on Oyster bracelet
Rolex Sky-Dweller Guide: References, Dials, Bracelets and Prices in 2026
|Filip Biczak
A reference guide to the Rolex Sky-Dweller: the 326 and 336 series, calibre 9001 and 9002, dial and bracelet options, how the Ring Command bezel works, comparisons with the Datejust... Read more...
Rolex Air-King 126900 40 mm Oystersteel with black dial, green seconds hand and Oyster bracelet
Rolex Air-King Guide: 126900 vs 116900, 34 mm References, Specs and Prices
|Filip Biczak
A family guide to the Rolex Air-King: the 40 mm 126900 and 116900, the 34 mm 114200 generation, what changed in 2022, how it wears and dated sourced-to-order asks. Read more...
Rolex GMT-Master II 126710BLNR Batman, 40 mm steel case with blue and black Cerachrom bezel on an Oyster bracelet, the reference used to show the gap between retail and dealer asks
The Three Price Tiers for a Luxury Watch: Retail, Dealer Sourced-to-Order and Auction in 2026
|Filip Biczak
How a watch's retail list price, a dealer's sourced-to-order ask and its auction results relate in 2026, why a few references trade above retail and most below, and how a... Read more...
Vacheron Constantin Overseas Self-Winding 37 mm 2300V/000M-B400 in steel with pink gold bezel, silver dial and alligator strap
Vacheron Constantin Overseas 2300V/000M-B400 Guide: 37 mm Steel and Pink Gold, Calibre 5300
|Filip Biczak
Reference guide to the Vacheron Constantin Overseas Self-Winding 37 mm 2300V/000M-B400 in steel with a pink gold bezel: calibre 5300, Hallmark of Geneva, 41 mm comparisons, dated prices and buying... Read more...
Omega Speedmaster Moonphase 44.25 mm 304.23.44.52.13.001 in steel and Sedna gold with brown dial and brown leather strap
Omega Speedmaster Moonphase 304.23.44.52.13.001 Guide: Steel and Sedna Gold, Calibre 9904
|Filip Biczak
Reference guide to the Omega Speedmaster Moonphase Co-Axial Master Chronometer 44.25 mm 304.23.44.52.13.001 in steel and Sedna gold: calibre 9904, METAS certification, steel and Racing comparisons, dated prices and buying... Read more...
Rolex Submariner 126610LN, 41 mm steel case with black dial and black Cerachrom bezel on an Oyster bracelet, the reference used as the full-set worked example
What Each Watch Document Is Worth: Box, Warranty Card, Receipts, Service Records and Archive Extracts
|Filip Biczak
What a warranty card, box, original receipt, service receipts, archive extract and chronometer certificate each add to a luxury watch's price, how dealers price a full set against a head-only... Read more...