Arnold & Son Time Pyramid Guilloché
The case, in 18kt red gold, measures 44.6mm. It has an AR-coated sapphire crystal. The caseback is decorated with a guilloché pattern, and it is water resistant to 30 meters.
Movement is the Swiss manual-wind Arnold & Son in-house caliber AS1615 with 27 jewels, 21,600 vph and a power reserve of over 90 hours. The movement is fitted with two power reserve indicators one each on either side of the linear gear train to display the energy level for each barrel separately. The power reserve hands indicate the reserve level via graduated dots (that are printed under the top sapphire crystal) in an arc format, and demonstrate how one barrel transfers energy to the second one when needed.
It features a skeletonised nickel-silver movement, NAC grey treated with Haute Horlogerie finishing, manually chamfered bridges with polished edges, Côtes de Genève, circular satin-finished wheels, and blued screws. The movement parts and watch indications are built on three levels, with the subsidiary seconds dial on the bottom, the hour indications on a sapphire crystal dial in the middle level, and a silver top ring for the minutes indication.
The dial is sapphire, circular satin-finished frame with chamfered and polished edges. The gear train runs vertically in a linear format connecting the two barrels at six o'clock to the balance wheel at twelve o'clock, and endowing the movement with its pyramid structure. The bridges are designed so that all of the wheels, the two mainspring barrels, the escapement and balance wheel are all visible from the dial side.
It comes on a hand-stitched brown alligator leather strap with an 18kt red gold buckle.
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