[Semi-skilled worker transferring numbers onto dial with rubber stamp machine, Hamilton Watch, Lancaster, Pennsylvania]

[Semi-skilled worker inserting balance screws in rim of balance wheel, Hamilton Watch Factory, Lancaster, Pennsylvania]

["Sunnyside," near covered bridge over Conestoga Creek with dump on one side and shacks on opposite bank, Lancaster, Pennsylvania]

[Skilled worker operating damaskeening machine operation for putting finishing lines on plates and bridges, Hamilton Watch, Lancaster, Pennsylvania]

[Semi-skilled worker operating wig wag machine for polishing pivots and staff shoulders, Hamilton Watch, Lancaster, Pennsylvania]

[Semi-skilled worker operating rectifying wheels, which corrects any inaccuracies in wheel, Hamilton Watch, Lancaster, Pennsylvania]

[Semi-skilled worker operating turret head to drill, counter-sink, face, and sharpen parts, Hamilton Watch, Lancaster, Pennsylvania]

[Skilled inspector using high-precision toolmaker's microscope, accurate to .0001 of an inch, to examine watches, Hamilton Watch Factory, Lancaster, Pennsylvania]