These timepieces represent a convergence of horological craftsmanship and precious metal casing. Specifically, the term denotes a portable time-telling instrument manufactured by the Waltham Watch Company, encased in a housing made of silver. These instruments were historically carried in a pocket and typically featured intricate movements and detailing.
Possessing such an item signifies ownership of a piece of American history. The Waltham Watch Company was a pioneering force in mass-producing high-quality watches, and those encased in silver offered a balance of elegance and durability. The silver casing provided protection for the delicate inner workings while also offering an aesthetic appeal, making them desirable as both functional tools and status symbols.