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...ich had previously relied on a single barrel design for long power reserve movements but suffered poor [[isochronism]] as a result. ...watch also features a [[perpetual calendar]] mechanism with a [[sidereal]] time display on the reverse. ...

Arnold & Son traditionally used [[Jaquet]] (now [[La Joux-Perret]]) movements, most of which used [[Valjoux]], [[ETA]], or [[Sellita]] [[ebauche]]s. In M ...billon Escapement Dual Time Watch"|DTE – Double Tourbillon Escapement Dual Time]] ...

The '''94000''' family of calibres is a series of specialty [[manufacture]] movements produced by [[IWC]] since [[2011]]. ...ich had previously relied on a single barrel design for long power reserve movements but suffered poor [[isochronism]] as a result. ...

...strated the accuracy of small watches. Ditisheim's work in chronometry and time measurement earned him recognition and awards from the scientific community ...tic envelope, the chronometer with electrical recording of the second, the sidereal chronometer, the astronomical chronometer with an equation mechanism, the m ...

...e (15 jewels, 18,000 vph, 50 hour power reserve). Eventually, 11 different movements were used in pre-war Reversos. Although a popular watch in its time, the Reverso was not produced for long. It was surely remembered well but i ...