Up for sale is a classic, early-to-mid 20th-century vintage adjustable straight bar tap wrench. This is a highly sought-after, heavy-duty machinist tool featuring the traditional side-mounted knurled adjusting screw rather than the modern twist-handle design. Product Features & Condition: • Design: Authentic side-screw clamping mechanism with dual knurled handles for a secure grip. The design profile is consistent with high-quality vintage American manufacturing (such as Butterfield or S.W. Card). • Dimensions: Measures exactly 8.75 inches in overall length. • Capacity: Size No. 1 footprint, ideal for small-to-medium hand taps (typically holding shanks ranging from roughly 1/16" to 3/8"). • Condition: Good, authentic vintage condition. The tool is completely unmarked/unbranded due to age and natural shop patina, but the structure remains solid. The side screw turns freely, and the internal clamping jaw adjusts smoothly. No cracks or major damage to the body. Perfect addition to a vintage tool collection or for daily use by an engine builder, machinist, or mechanic who prefers the weight and balance of classic steel shop tools. Please review all photos carefully to verify dimensions against the tape measure and assess cosmetic condition before purchasing. Sold as-is.