by Ray Montez on 20 October 2010 IWC Portuguese Regulator Wempe – Limited Edition Model# 544303 ( IW5443-03 ) The International Watch Company (IWC) of Schaffhausen , Switzerland is one of the premier Swiss watch-making companies. The IWC Portuguese Regulateur Model# 544303 ( IW5443-03 ) i ncludes a 98245-calibre mechanical pocket