Observatory chronometer
Chronomètre d'observatoire | 天文台クロノメーター／テンモンダイクロノメーター | 天文台表
A chronometer which has received an official rating certificate from an observatory.
A chronometer which has received an official rating certificate from an observatory.
Terms with the same letter
Observatory chronometer Official rating certificate Oignon (watch) Oil sink Oiling Onyx Opale Opaque Organic Orient Ornamental gems Oscillating pinion Oscillating weight (Rotor) Oscillation Oscillator Oval