Details Listing is for one rare and very A Roskopf, pin-lever, or pin-pallet escapement is an inexpensive, less accurate version of the lever escapement, used in mechanical alarm clocks, kitchen timers, mantel clocks and, until the 1970s, cheap watches now known as pin lever watches. 4P20 Japan 1 jewel N. Main use: It is used in the industries such as refractory quartz.
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