Up for sale is a pair of vintage Cincinnati Tool Co. (C.T. Co.) No. 550 3-inch C-Clamps made in the USA. Constructed from heavy-duty malleable iron, these American-made tools are built to last and are highly regarded by woodworkers, metalworkers, and vintage tool collectors.

Brand/Maker: Cincinnati Tool Co. / C.T. Co. (Hargrave line marked with "H" symbol)

Model: No. 550

Capacity: 3 Inches

Material: Malleable Iron

Country of Origin: USA

Quantity: Lot of 2 Clamps

Condition:

Pre-owned vintage condition with minor light surface rust and patina consistent with age and normal shop use. Both clamping screws turn smoothly, handles are straight, and swivel feet function properly. Please review all photos for precise physical condition.

Ships promptly and securely. Feel free to ask any questions!

Based on the markings (C.T. Co. / Hargrave circle "H" logo and font styling), these clamps date to the mid-20th century, specifically the 1940s to 1960s.

Key timeline indicators for Cincinnati Tool Co. (Hargrave):

Logo Markings: Cincinnati Tool Co. produced these standard "No. 550" malleable iron clamps starting in the 1930s through the late 1960s before the company transitioned into Warren Tool Corp.

Styling: The raised sans-serif lettering and "C.T. Co." stamping on malleable iron are typical for their production period during and immediately following World War II (1940s–1950s).