Fairmount 11-inch Auto Wrench (Monkey Wrench)
Fairmount Tool & Forging Co. · Tools & Hardware > Collectible Hand Tools
Era / Decade
1940s (WWII Era)
Material
Drop-forged carbon steel with high industrial durability
Condition
Fair to Good. Significant surface oxidation and rust present. The adjustment worm gear appears functional but needs lubrication. No major cracks in the forging.
Demand Level
Niche but Strong (Specific demand from military vehicle restorers and vintage tool collectors).
Resale Value
Estimated Resale Value
$15.00 - $45.00 (Highly dependent on cleaning and specific buyer need for vintage tool kits)
Estimated Retail Value
$25.00 - $35.00 (Modern equivalent like Bahco or high-end adjustable wrench)
Comparable Sales
Recent eBay sales for rusted Fairmount 11-inch wrenches range from $18 to $25, while cleaned, excellent examples can reach $50+.
Description
Vintage Fairmount 11-inch adjustable 'auto' or monkey wrench. Features the distinctive 'FAIRMOUNT U.S.A. 11 IN' stamp on the handle. This style was famously included in military vehicle on-board tool kits (OVM) during WWII, specifically for the Willys MB and Ford GPW Jeeps.
Key Features
WWII Military vehicle provenance; identifiable maker's mark; heavy-duty drop-forged construction; highly sought after by Jeep restorers.
Authenticity Indicators
Clear forged lettering on handle; specific 11-inch size matches military contract specs; High confidence in authenticity.
Flaws to Note
Extensive surface rust and patina; requires Evapo-Rust or wire brushing to restore movement; minor pitting on the jaw edges.
Selling Guide
Where to Sell
eBay (best for broad reach to collectors), Etsy (if marketed as industrial decor), or specialized military vehicle forums (G503.com).
Selling Tips
Do not over-polish; collectors often prefer an 'as-found' patina or a gentle chemical rust removal. Use keywords like 'WWII Jeep Tool', 'Willys MB', 'Ford GPW', and 'OVM'. Take clear photos of the brand stamp.