L'explication/l'anotation:Mechanical. Number of ruby rocks - 21
La description détaillée de marque:The mechanism 2409
the oscillation period of balance, sec - 0, 4
the diurnal mean pitch ñåê/ñóò. | - 20 - 40
mechanism height, MM - 3, 45
term of electric power autonomy, hour - 45
calibre, MM - 24
central second pointer. |