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I recently bought a 1966 version. It runs perfectly and I’m happy with it and use it as a vintage beater. It’s not as slim as some watches of that time but still pretty good.
Such research as I’ve done suggests that the watch was marketed as DS ‘double security’ by being both waterproof and shockproof by virtue of a rubber/plastic mounting.
The problem I’ve had is that in mine, and I imagine in most of these 1960s DS watches, the rubber mounting (in yellow, below) has ossified to the extent that my watchmaker has advised against a full service in case the mounting cracks and can’t be replaced. To be fair, I wanted one of these but only paid €190 plus a set of NOS hands to replace the mismatched hands I bought it with.
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