contrast Omegas then flagship chronograph, the limited edition Speedmaster 125 sold for £186.50. Omega Electroquartz clock In addition to the beta 21 Electroquartz watches Omega also developed an 8192 Hz Electroquartz clock, this was Omega SA's first quartz production quartz clock and used a thermo-compensated quartz bar and integrated circuit, produced in very small numbers under caliber 1390. The quartz clock was supplied in a stylish grey Cycolac resin case, because of the size and complexities of the movement the clock was quite large and weighed in at over 1 kilo. The clock runs on 4 AA type batteries and has an accuracy of circa 12 seconds per year. It features time and date and has a lever for manually trimming the seconds without interfering with the operation of the watch. There are very few remaining examples of these clocks, other than those on display at the Omega museum in Bienne and Swiss Time Services in the UK, and there are less than 10 known examples in private collections. The pictured clock (owned by Omega collector Thomas Dick) is serviced and working correctly and is accurate to 12 seconds per year, which is within specification of +/- 1 second per month when kept at a constant temperature of between 10 °C and 30 °C. Summary Despite the significance of the beta 21 series of watches the speed of development of quartz wristwatches during the 1970s as well as the influx of reliable quartz technology from Japan meant that the beta 21 and beta 22 wristwatches became obsolete almost as they came into initial production. Omega's development of their own in house Megaquartz range of watches developed by SSIH included the reliable 32 kHz lines (accurate to 5 seconds per month) as well as their flagship Omega Marine Chronometer (accurate to 12 seconds per year) rendered even Omegas efforts to reap their investment very difficult. By the end of the 1970s and into the early 1980s the industry had made such advances in quartz watch technology that Omega were producing 18-carat models which were less than 2mm thick (the dinosaur) which were accurate to 5 seconds per month, as shown in the attached image of watches, which is a stark demonstration of how far quartz technology watches had progressed in less than a decade. Within ten years of the introduction of the beta 21 the Swiss watch industry was in a