This is a battery powered clock movement by the Self Winding Clock Company of New York.
Self Winding Clock Company History
This company was formed in 1886 by Charles Pratt with Henry Chester Pond. The design was based on automatically winding the clock each hour with a motor powered by two 1-1/2 volt dry cells located in the case.
The advantage of this high-quality, pendulum-controlled movement, combined with the constant driving force of the small, frequently wound mainspring, was that it yielded a highly accurate clock subject to minimal wear.