Box, papers, polishing, service history, replacement parts. The facts that move a watch thousands of dollars are scattered through listing text, or left out entirely. Kron reads every listing and tells you exactly what the seller said, and what they didn't.
iOS first. One email when it opens, nothing else.
One real listing
This is what a seller wrote. This is what Kron found in it.
ROLEX SUBMARINER 1680 40mm GORGEOUS PATINA DIAL WITH MATCHING HANDS STAINLESS STEEL 5.5 million SERIAL NUMBER FROM 1979 ROLEX 93150 BRACELET WITH STRETCH WATCH IS IN VINTAGE PRE OWNED CONDITION WITH SIGNS OF USE COMES COMPLETE WITH BOX AND PAPERS ( DATED 1979 ) ROLEX SERVICE PAPERS FROM 2002 100% COSTUMER SATISFACTION
Kron never guesses. Nothing in that listing mentions polishing or the dial, so Kron says so rather than filling the gap. If a seller stayed quiet about something that matters, that silence is the finding, and you see it before you bid.
One active listing, read 24 September 2026. The figure is the seller's asking price, not a sale price.
Find it, get told when it appears, know what it's worth once it's yours.
Tudor Black Bay 79220R, red bezel, box and papers
Ref. 79220R · $3,799
What Kron found
What was confirmed, and what was never mentioned.
Sellers bury the details or leave them out. Kron reads each listing word by word and shows what was confirmed and what was left unsaid. You compare condition instead of guessing at adjectives.
Tuesday, September 24
9:41
Kron checks every new listing as it goes live.
Describe the exact watch you want, down to papers and an unpolished case. Kron watches every new listing as it goes live and tells you within minutes, while the good ones are still there.
Cartier SantosWSSA0018Rolex Daytona 116500LN
$31,500
Median asking price
Tracked against what the market is asking.
Add the watches you own and Kron tracks them against what comparable listings are actually asking, not what you paid. Where the data is thin, it says so instead of inventing a number.
Every watch, reference and figure on this page comes from a listing Kron actually read. Counts and prices are as of 24 September 2026 and move as new listings arrive.
Kron launches on iOS. One email when it opens, and nothing else.