#WatchWednesday The Royal Blue Tourbillon by @ulyssenardinofficial is both visually spectacular and fully transparent. The CAL-35 movement operates with a sapphire crystal main plate, the bridges in blue sapphire crystal, a one minute tourbillon capped by a brilliant cut sapphire, and a larger outer gear the size of the movement transfers winding to the mainspring. The effect is spectacular, and housed in a platinum case with blue sapphire set indexes. On offer with an estimate of $30/50,000 in our upcoming December auction of Important Watches in #NYC. #SothebysWatches #UlysseNardin #RoyalBlue #Tourbillon #Platinum #Skeletonized #wristwatch #watch #watchesofinstagram #watchcollector #watchgeek