Coes Monkey Wrench Value Guide

The Coes Monkey Wrench is a cornerstone of American industrial history, patented by Loring Coes in 1841 as the first successful screw-adjusted wrench. Its durable iron construction and signature wooden handle made it an essential tool for 19th-century engineers and mechanics.

What Is Coes Monkey Wrench Worth?

The typical price range for Coes Monkey Wrench is $50 - $70 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the wooden handle, as cracks or missing chunks significantly reduce the $50-$70 market value.
• Clarity of the manufacturer stamps and patent dates on the iron components.
• Mechanical functionality of the screw-adjust mechanism and the alignment of the smooth jaws.
• Rarity of specific sizes, with very small or exceptionally large industrial versions commanding higher prices.

How to Identify Coes Monkey Wrench?

• Look for the 'L. COES' or 'COES WRENCH CO' stamp on the iron shank or jaw.
• Verify the presence of the original two-piece wooden handle scales secured by a steel ferrule.
• Check for the 1841 patent date or subsequent improvement dates stamped into the metal.
• Ensure the adjustment screw is located beneath the lower jaw, a hallmark of the Coes design.

History of Coes Monkey Wrench

The monkey wrench, an adjustable wrench with smooth jaws, was popularized by the Coes Wrench Company. Loring Coes invented and patented the screw-adjusted wrench in 1841. His design was so effective and widely adopted that the term 'Coes wrench' became synonymous with monkey wrenches. These tools were essential for plumbers, mechanics, and engineers during the 19th and early 20th centuries, facilitating repairs and construction before standardized fasteners became prevalent. The company's legacy is a testament to the durability and utility of their tools.