With an 18 karat red gold case, laser-engraved double barrels, and a tourbillon, the Arnold & Son Tourbillon Chronometer No. 36 immaculately frames John Arnold’s legacy. The timepiece, with its three-spoke design typical of Arnold & Son, sits pretty in a mirror-polished cage that is visible on the watch’s sapphire case back. The anthracite open dial lauds seven sharply-oblique bridges and the 18 karat chatons swathed in red gold are anchored by hand-stitched alligator straps. The COSC-certified, 46-mm timepiece, available as a 28-piece limited edition in red gold and stainless steel, provides an impressive 90-hour power reserve when wound. The see-through back combined with the skeletonized display in the front complements the muted majesty of the tourbillon in a manner perfectly suited to commemorate the archetype’s upcoming 240th anniversary in 2018.