The Vintage C.E. Marshall Co. Watch Craft Balance Truing Caliper is a high-quality poising tool made in the United States. This caliper is designed specifically for watchmakers to true and adjust the balance wheel of a watch to ensure proper functionality. With the brand name of Marshall known for its craftsmanship and reputation in the watch industry, this tool is a valuable and reliable piece for repairing and maintaining antique watches. Made with precision and durability, this caliper is a must-have for serious watch enthusiasts and professionals.