Ship's clocks were different from normal clocks in a few ways. First of all, they had to be much smaller because there was not as much room on a ship as there was in a house or in a store. Second, the clocks needed to be built so that they were portable. The tossing and turning done on a boat would have rendered normal pendulum driven clocks basically worthless, because the clock would never be level and would constantly be changing altitudes. Third, the clocks needed to be functional and practical, now showy or complicated. They needed to be easier to read, work well, and needed to be reliable. So, making ship's clocks was a challenge to any clock making factory, but for the clockmakers who made good ones it paid off. By the time of the early 1900s, every ship and/or boat needed a clock. That was a lot of clock sales for the ones with competitive prices.
 Seth Thomas 1938 Ships Bell 4 Ships Bell Clock  US $57.50
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 Chelsea WWII Black Phenolic Resin Case Navy Ships Clock US $299.99
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 SOLID BRASS SHIPS CLOCK US $30.00
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 1944 Brass Nautical Ship Wheel Clock Advertising USA US $24.95
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 CHELSEA US GOVERNMENT SHIPS CLOCK DIAL NOS US $29.00
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 Vintage Chelsea Navy Ships Clock US $189.95
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