An ordinary 18 size watch of present day is composed of about 200 pieces. Making 18,000 beats or vibrations per hour, it has to make 432,000 per day, or 157,680,000 per year. The balance travels 1.43 inches with each vibration, which is equal to 9.75 miles in 24 hours, 292.50 in 30 days, or 3,558.75 miles in one year.
The amount of oil used in oiling the entire watch is about one-tenth of one drop, while the oil that can be put in the balance jewels with safety must not exceed one one-hundredth of a drop.
From the Watchmakers and Machinists Hand Book, published in 1897.
The amount of oil used in oiling the entire watch is about one-tenth of one drop, while the oil that can be put in the balance jewels with safety must not exceed one one-hundredth of a drop.
From the Watchmakers and Machinists Hand Book, published in 1897.
