![]() They also made some of the best cases for different manufacturers, such as the Omega Speedmaster 321 ‘Moonwatch’, and you will notice this Certina has similar turned in lugs. The case is made by Huguenin Frères, and they patented the double shock (hence DS) system for this watch. Look at the ingredients and you will see why it is deserved of more love. The DS is one of the currently few overlooked classic watches. These early watches never had the turtle embossed caseback either. This early watch still has SWISS PATENT PENDING inside the case back, and in 1960 the movement calibre used had changed. ![]() Model reference 5601.012ĭS models do not have serial numbers, but the range was launched in 1959 and the technology patented in late 1958. One of the earliest Certina DS models ever made, still with the Gay Frères bracelet.
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