On May 29,1884, the Boston Clock Company was established. It was the successor to the Harvard Clock Company which was founded by James H. Gerry, Joseph H. Eastman and a few others. The Boston Clock Company was listed in Boston directories begining in 1885, managed by Joseph H. Eastman.
The Boston Clock Company began manufacturing imitation French crystal regulator, carriage, and mantel clocks. Most of the clocks had quality movements and were wound by turning a key in opposite directions (tandem winding). By 1890, the company had issued a trade catalog featuring more than 50 different models.
In 1895, to save the failing company, Joseph Eastman renamed the Boston Clock Company the Eastman Clock Company. Eastman purchased land in Chelsea and built a new factory. A year later, Eastman Clock Company was closed.