====== Arnold & Son Time Pyramid Guilloché ======

{{wst>image_cr|Arnold & Son|Time Pyramid Guilloché}}
{{wst>image_r|A&S 1615|Calibre A&S 1615\\ © [[Arnold & Son]]}}

**Time Pyramid Guilloché** is a wristwatch by [[Arnold & Son]].

This new reference of the iconic //Time Pyramid// is part of the brand's //Instrument Collection// that combines instrument precision with classical styling. It features the hand-[[chamfered]] [[A&S 1615]] calibre, housed in a 18-carat [[red gold]] case with a new case back beautifully decorated with a [[guilloché]] pattern on both sides. The movement with unique [[skeletonised]] pyramid-shaped architecture, was conceived, designed and developed in-house.

The skeletonised calibre A&S 1615 follows the original regulators from the brand with its component positioning and detailed 3D visual appeal. 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. While the movement is extremely thin - at just 4.4 mm - the multiple levels bring amazing depth and detail to the watch. To further enhance the balance and symmetry of the Time Pyramid, the crown is artfully positioned at six o'clock.

The [[gear train]] runs vertically in a linear format connecting the two [[barrel]]s at six o'clock to the [[balance wheel]] at twelve o'clock, and endowing the movement with its pyramid structure. The [[bridge]]s are designed so that all of the wheels, the two [[mainspring]] barrels, the [[escapement]] and balance wheel are all visible from the dial side.

Additionally, the movement is fitted with two [[power reserve indicator]]s -- 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. Essentially, as the first barrel winds the second one, the power reserve indicator of the first barrel goes down, while the second one goes up -- making for an accurate and intriguing readout. The two mainspring barrels supply the hand-wound calibre with an amazing 90 hours of power reserve, and provide a more [[constant force]] to the wheel train.

The movement is magnificently hand decorated with hand-chamfered brides and high-polished edges, Côtes de Genève, circular satin-finished wheels and blued screws, all yielding a striking masterpiece of decorative craftsmanship and brilliant execution.

Each Time Pyramid wristwatch measures 44.6 mm in diameter in its classically elegant 18-carat red gold case with a case back decorated with a [[guilloché]] pattern on both sides. Viewed from the side, the housing is stepped and tapers from top to bottom, the widest section accommodating the extra-large glass with the lower part narrowing to fit snugly on the wrist.

//Using a text by Arnold & Son//

<WRAP ud ud_mod>
**Reference:**
  * 1TPAR.F01A.C125A

**Movement:**
  * [[Skeletonized]]es [[manufacture movement]] [[A&S 1615]], manual winding, 21,600 A/h
  * [[Double barrel]]
  * [[Nickel silver]], [[rhodinated]]
  * [[Haute Horlogerie]] finishing manually [[chamfered]] bridges with polished edges, [[satin-finished]] [[mainplate]], [[Geneva stripes]], circular [[satin-finished]] wheels, [[blued]] screws.
  * 27 [[jewels]]
  * 90 hours [[power reserve]]

**Case:**
  * 18 ct [[rose gold]]
  * Ø 44.6 mm
  * Domed [[sapphire crystal]], [[antireflective]] on both sides
  * Closed caseback, guilloché on both sides
  * [[Waterproof]] to 3 atm

**Dial:**
  * [[Sapphire crystal]], circular [[satin-finished]] dial frame with chamfered and polished edges

**Functions:**
  * Hours, minutes and seconds
  * Two [[power reserve indicator]]s

**Bracelet:**
  * Hand-stitched brown alligator leather

**Prize:**
  * 46.900,- Euro (2015)
</WRAP>

{{tag>Watch_models Arnold_&_Son_models}}