The drawings of the buildings and floor plans offer interesting insights into how work was organized. The elevation drawing shows the general structure of the factory. The floor plan drawing shows the layout of the work rooms. In the middle (detailed floor plan) drawing, you may click on the lower central portion to enlarge the legend and the adjacent small offices.
Expanding Floor Plan 1902
American Watch Works Detail Plan (click for department detail)
Hartwell Drawing of Elevation in 1879