Ingersoll Caliber 519

Brand	Ingersoll
Caliber Number	519
Base Caliber	Seagull ST3600
Movement Type	Mechanical
Jewels	17
Power Reserve	Unknown (comment below)
Vibrations Per Hour	21,600 bph
Hacking	No
Features	Hours, minutes, central seconds
Country of Manufacture	China
Known Models	IN3105

Ingersoll mechanical caliber IN 519. This movement was found in an Ingersoll Chinook model. Chinese-made with 20 jewels. Ingersoll claims this movement should stay accurate between -30 to +30 seconds per day when worn under normal conditions.

According to the Ingersoll manual:

A mechanical watch is a device for keeping time, which uses the energy from a wound spring, and keeps time through the highly regulated release of that energy through a set of gears (the wheel train) and an escapement. It differs from typical quartz watches in that it uses purely mechanical components to keep time. Mechanical watches typically can run for about 40 hours on one full winding of the mainspring.

Important:

Over winding the mainspring may cause damage to the mainspring. Only wind the spring as far as it will go but not beyond.

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