The origins of the IWC Portugieser are somewhat shrouded in myth, but it is widely agreed by scholars that in 1939, Portuguese watch importers – a Mr. Rodrigues and a Mr. Teixeira – made a special request of IWC: to create an oversized wristwatch with a highly accurate movement. IWC took up the challenge, utilizing first their pocket watch caliber 74, a manually wound savonette movement with subsidiary seconds and a 54-hour power reserve. The wristwatches of the era were typically quite small, with a 36mm diameter being considered oversized, so a 42mm diameter wristwatch was positively gigantic.