Introduction
Launched in 2012 as a limited edition model of just 80 pieces, the Harry Winston Ocean Tourbillon GMT Worldtimer ref. 400-MATTZ45R marries Harry Winston’s famed craftsmanship as one of the world’s most prestigious jewelers and their impressive horological capabilities into a timepiece that is luxurious, capable, and thoroughly impressive. Created as sporty take on the tourbillion, the ref. 400-MATTZ45R boasts a 45.5mm 18kt rose gold case that commands an impressive 100m of water resistance, and a world-time function that makes this the perfect travel watch. Powered by the automatic cal. HW1005 movement with 110 hours of power reserve, the ref. 400-MATTZ45R features a two-piece silver dial that includes twin subdials that house its time-telling displays that sit atop its tourbillon aperture at 6 o'clock. Clearly designed to be legible and functional, it also includes a city aperture that marks where the second timezone relates to.
Loupe This Scorecard
Grade
M 8.5
Status
Vetted & Approved
Included
Watch Only
Est. value range
$40,000 – $60,000
The Details
Brand
Harry Winston
Dimensions
45.5mm
Model
Ocean Tourbillon GMT Worldtimer
Movement
Automatic cal. HW1005
Reference
400-MATTZ45R
Bracelet
Rubber strap
Year
Circa 2010s
Condition
Excellent
Material
18kt rose gold
Included
Watch only
Dial Color
Silver

THE DIAL
Featuring a two-piece silver dial with twin subdials to house the hour displays sitting atop its tourbillon aperture at 6 o'clock, this timepiece has clearly been designed to be legible and functional, with its city aperture clearly marking where the second timezone relates to.

THE CONSTRUCTION
Made of 18kt rose gold and offered on a rubber strap, the Ocean Tourbillon GMT Worldtimer is just as functional as it is beautiful, with its 45.5mm case boasting polished lugs and a concentrically brushed bezel with polished embelishments.

TIMING MACHINE READOUT
This reading was taken (crown down) with a ONEOF Accuracy Boutique Edition timing machine at time of cataloging. It is provided as a courtesy only, and shall not be construed as a warranty or guarantee of any kind. Please refer to our terms and conditions of sale for more information.
Condition
The watch is in overall excellent condition. The rose gold case shows some marks on the bezel and light scratches on the case sides, polished pushers, and lug flanks. The display case back has some scratches on the outer edge but retains very well-defined engravings and hallmarks. The dial and hands are near-mint. The watch is fitted with a black rubber strap and a Harry Winston rose gold deployant clasp, both in excellent condition.
Our Perspective
Combining Harry Winston's reputation as one of the world's most luxurious jewelers with some awe-inspiring horological artistry, this timepiece exists in a liminal space between watchmaking and craftsmanship.