Monaco 1533
Heuer developed the Calibre 15 movement as a simpler and thus cheaper version of the Calibre12, launching an alternative range of watches in 1972. This included the Monaco 1533 which was available in a metallic blue and silver dial with brushed steel hands with red accents. The case was the same as the 1133 and it is not uncommon to find a 1533 in a 1133 case.
