Original Longines Watch Co. movement signed C.R. Smith & Son Philadelphia. Specifications: Longines Calibre 13.97 Movement size: 29.5 mm – Dial size 29.2 mm Original vintage movement Condition: The balance moves freely and appears responsive. Sold as project movement. Please study the photographs carefully as they form an important part of the description. History: C.R. Smith & Son of Philadelphia was a respected American jeweller and watch retailer that supplied quality Swiss watches and movements to the U.S. market. During the late 19th and early 20th centuries it was common for retailers to have their names associated with Swiss-made products from prestigious manufacturers such as Longines. The Longines calibre 13.97 belongs to a family of compact movements produced during the early wristwatch era. These movements were valued for their reliability, quality construction and suitability for a wide range of watch designs. Today original Longines movements remain sought after by collectors, restorers and horological enthusiasts.