Other highlights include an exhibit of the pioneering automated machinery developed by the American Waltham Watch Company, allowing for the first time to mass-produce watches using interchangeable parts, a large selection of American pocket watches (including Railroad watches), and the "Engel Clock", a complicated "monument" clock built by Stephen Decatur Engel of Hazleton, Pennsylvania. This clock took Engel about 20 years to complete, and it was shown for many years all around the United States starting in about 1877.
Highlights encompass an exhibit of automated machinery developed by the American Waltham Watch Company, enabling mass production of watches with interchangeable parts; a selection of American pocket watches (including Railroad watches); and "Engel Clock," a complex monument clock crafted by Stephen Decatur Engel from Hazleton, Pennsylvania. This clock took about 20 years to create and was exhibited across the United States starting around 1877.