Very rare,the highest grade Henry Moser pocket watch movement,chronometre class,better quality than Patek Philippe from the same period(80-90 years of XIX century). The movement-nickel bridges,21 jewels,Breguet hairspring,unusual safety pallet fork,big compensation balance wheel,wolf teeth winding wheels,strange setting-you should pick out then keep the crown and turn it to set the correct time.The movement is in good working order and keeps time.The original porcelain dial is not "on legs" but on ring-it has a hairline near 5.The hands are original and perfect. The diameter of the movement is 43,4mm at the bottom and 46mm at the dial side.The case is not original(nickel plated,screwed down back and top,52mm in diameter).