Though better known for his telephones, Daniel Drawbaugh also patented and made an early earth battery-driven electric clock. Sorry we dont know of any clocks to photograph but the folder contains the patent and her are links to some internet resources including one clock now in the The Cumberland County Historical Museum, 21 N. Pitt Street, Carlisle, PA 17013:
https://www.facebook.com/cchscarlislepa/posts/conservation-drawbaugh-electric-clockthe-great-cumberland-county-clockelectric-c/1107513739264423/
http://www.bowersconservation.com/drawbaugh.html