Throughout IWC's history, 37 versions of the Big Pilot's watch featured a perpetual calendar complication. Needless to say, the formula is a company mainstay. It's also one of the most technically complex watches IWC makes. IWC's first perpetual calendar caliber was developed by Kurt Klaus in the '80s and accounts for discrepancies in the length of months and leap years. In theory, if the watch were set correctly and received regular winding, it wouldn't have to be adjusted until the year 2100.

Topwatch offers you only the best certified pre-owned watches for sale. Each Swiss timepiece has undergone a thorough inspection and service process. Each timepiece comes with a 24 month Topwatch warrantee.

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.