This vintage tool is a must-have for any railroad enthusiast. Made in the United States, it is a high-quality piece of hardware that is sure to impress. Its unique design is perfect for measuring wheel defects on roadroad tracks. The tool is a great addition to any collection and is perfect for display or practical use. Its durability and accuracy make it a valuable piece for anyone interested in railroadiana and transportation collectibles. No makers mark. Marked 189-3035 15"/16 . Measures 5" wide.