▁very ▁few ▁movements ▁were ▁ever ▁given ▁the ▁attention ▁and ▁manufact uring ▁level ▁necessary ▁to ▁pass ▁the ▁observ atory ▁standards , ▁there ▁are ▁very ▁few ▁observ atory ▁chron om eters ▁in ▁existence . ▁Most ▁observ atory ▁chron om eters ▁had ▁movements ▁so ▁special ized ▁to ▁accuracy ▁that ▁they ▁could ▁never ▁with stand ▁being ▁used ▁as ▁w rist watch es ▁in ▁normal ▁usage . ▁ ▁They ▁were ▁useful ▁only ▁for ▁accuracy ▁compet itions , ▁and ▁so ▁never ▁were ▁sold ▁to ▁the ▁public ▁for ▁usage . ▁ ▁However , ▁in ▁ 1 9 6 6 ▁and ▁ 1 9 6 7 , ▁Gir ard - Per reg aux ▁manufact ured ▁ 6 6 2 ▁w rist watch es ▁with ▁the ▁Cal ib re ▁ 3 2 A ▁High ▁Fre quency ▁movements , ▁which ▁beat ▁at ▁ 3 6 , 0 0 0   b pm . ▁All ▁ 6 6 2 ▁movements ▁were ▁sent ▁to ▁the ▁B ure aux ▁Offic iels ▁de ▁Con tr ôle ▁de ▁la ▁mar che ▁des ▁mon tres ▁( B . O ), ▁who ▁cert ified ▁them ▁as ▁chron om eters ▁and ▁issued ▁Bul let ins ▁de ▁Mar che ▁for ▁each ▁unit ▁with ▁the ▁additional ▁comm end ation ▁of ▁' es pecially ▁good ▁results '. ▁ ▁Gir ard ▁Per reg aux ▁selected ▁ 4 0 ▁of ▁these ▁movements ▁for ▁further ▁testing ▁by ▁the ▁Ne uch atel ▁Observ atory . ▁These ▁ 4 0 ▁movements ▁were ▁tested ▁for ▁another ▁ 4 5 ▁days , ▁it ▁was ▁these ▁ 4 0 ▁that ▁became ▁the