A 1941 Principia made in collaboration with Chicago-based retailer Sydel & Sydel, 1 of 10 examples. The Sydel & Sydel Edition features a teutonic grey-blue with just a hint of teal, a precise shade known as Gröneblue which varies drastically with light. Its 226-component automatic calibre features steel bridges shaped after Dutch bell gable rooftops, with ample fine hand finishing techniques employed. The 1941 Principia is the ultimate in minimalist, Dutch independent watchmaking, arguably never better-looking than in vibrant Gröneblue.