They are mainly generic representations of various vehicles that were often steam powered in the past.
Most of these whistles were steam powered and not standardized.
The company went steam powered from 1814, initially with a series of 0-6-0T locomotives.
The two mills were steam powered and manufactured fine cotton yarn for hoisery.
All are steam powered and maintained in the Ready Reserve Force with 5 days as time to activate.
June 16 - The last steam powered through passenger train runs on the Canada Southern.
The Macks try working with steam powered and electric motor cars.
Originally horse drawn, they became steam powered by 1890, and then electric by 1899.
Most large cities had steam powered municipal systems by the 1870s.
The David class of torpedo boats were steam powered with a partially enclosed hull.