Assertion: mechanical timepiece | /r/HasProperty | chronometres-mecaniques
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text: In 2017 the Observatory Chronometer Database (OCD)  went online, which contains all mechanical timepieces ("chronometres-mecaniques") certified as observatory chronometers by the observatory in Neuchatel from 1945 to 1967, due to a successful participation in the competition which resulted in the issuance of a Bulletin de Marche.