Part of the Carrera line, in the 1960s, Heuer produced the Dato – Reference 2547 – which was their version of the triple-date chronograph, powered by the Valjoux 72C. This model came fitted with white and black dials; this example features the white-dial layout. This Heuer Dato is excellent condition. The case appears unpolished, showing normal wear, and lightly rounded ages. The dial is great, with no visible marks or flaws. The original tritium lume is present on both dial and hands, aged to a golden yellow.