Changing colors frequently since 1974: Seiko Superior Morpho. A horological milestone in design but foremost in precision: the cal38 (Sampachi-Quartz) in its highest quality; exact to <=2s per month (!sic). Thats the result of using analog thermo-compensation -- something that "inspired" Rolex and was used in the OysterQuartz cal5135 since 1978.