The IWC Portugieser Annual Calendar IW503502 (introduced 2015) is the original and most iconic version of IWC’s groundbreaking triple-window annual calendar — now universally regarded as one of the cleanest, most elegant high complications in modern horology. Housed in a perfectly proportioned 44.2 mm stainless steel case (14.9 mm thick), it features the legendary midnight-blue sunburst dial that shifts from near-black to electric sapphire depending on the light.

The symmetrical layout is pure genius: large date at 12 o’clock, day at 9, month at 3, week-number indicator between 8 and 9, and small seconds at 6 — all powered by the in-house Calibre 52850 automatic movement with twin barrels, Pellaton ceramic winding, and a massive 7-day (168-hour) power reserve. The beautifully decorated movement and gold-plated rotor are visible through the sapphire caseback.

Delivered on a black Santoni alligator strap with stainless steel folding clasp, the IW503502 remains the benchmark Portugieser for collectors who value complication, legibility, and understated beauty. Although newer references exist, this blue-dial original is the one that started the legend.

Key Features of the IWC Portugieser Annual Calendar IW503502:

• In-House Calibre 52850: 7-day power reserve + ultra-clean annual calendar (correct only once per year on March 1).
• Iconic Midnight-Blue Sunburst Dial: The most photographed and desired Portugieser color ever made.
• Triple-Window Symmetry: Date, day, month + week number in perfect balance — no sub-dials required.

This timepiece has undergone a thorough inspection of water resistance, accuracy, functionality and condition to determine the level of reconditioning required to meet our strict standards. It has also been referenced against technical documents and manufacturer records where available to ensure authenticity and a clean history.

Topwatch 12 Month Warranty Included.

Orders are dispatched from Topwatch during normal South African business hours, which are 08:00 to 17:00.

For our customers, we only accept the lowest cost and safest delivery procedures possible. All packages shipped via Topwatch are fully insured against loss, theft & damage during transit at no extra cost to you.

Due to the valuable nature of Topwatch products, we require a signature from an authorised person for your delivery at your nominated delivery address. Products will be deemed received by you, if accepted by a person at your nominated delivery address.

Insurance applies until the order is delivered to your nominated address. Delivery details must include a daytime contact telephone number. *Post Office boxes cannot be used for deliveries by our Couriers.

Overseas deliveries may be subject to import charges and other local taxes. Any such charges are the responsibility of the customer. Customs restrictions may also apply.