Vintage Trimo Monkey Wrench 18 Inch Adjustable Wrench Trimont Pat 1911

Vintage TRIMO / Trimont 18-inch monkey wrench with smooth jaws, crisp maker and patent markings, and a clean preserved finish. The wrench body is marked with a December 19, 1911 patent date, while the adjusting-nut guard carries a later January 4, 1927 patent date, placing the wrench in its present configuration no earlier than 1927 if the guard is original to the tool.

Tool details

This is a genuine vintage TRIMO monkey wrench made by Trimont Mfg. Co., Roxbury, Mass., U.S.A. It measures about 18 inches long and retains clear period markings including SIZE 18” and PAT’D 12-19-1911. The adjusting-nut guard is separately marked PAT’D JAN 4 1927. The 1911 patent relates to protection of the wrench’s adjusting mechanism, while the later 1927 patent covers an improved removable adjusting-nut guard. If the guard is original to this wrench, the assembled tool dates to 1927 or later. It is the smooth-jaw monkey wrench form, not a toothed pipe wrench, with the bold TRIMO logo on both sides of the head.

Condition

Overall very good vintage condition with honest age and use wear. The wrench has a clean dark steel patina with some minor surface marks and small traces of age left in recessed areas. Markings remain strong and very readable. No handle issues, no major rust, and no obvious abuse noted. Adjuster was stiff when acquired but is now moving properly after cleaning and lubrication. As with any old tool, expect normal cosmetic wear from age and prior use.

Restoration performed

This wrench only needed light conservation, not heavy restoration. It was:

• cleaned with mineral spirits,
• lightly addressed in a few recessed areas with WD-40 and a 3M pad,
• oiled to improve adjuster movement,
• and finished with a thin protective coat of wax.

No repainting, no heavy grinding, and no over-restoration.

Ideal use

A good piece for:

• vintage tool collections,
• workshop or office decor,
• farmhouse / industrial display,
• gift for a mechanic, woodworker, or tool collector,
• or light period-correct practical use.

Bullet highlights

• Genuine vintage TRIMO monkey wrench
• Made by Trimont Mfg. Co.
• Marked Roxbury, Mass., U.S.A.
• 18 inch size
• Smooth jaw adjustable wrench
• Body marked PAT’D 12-19-1911
• Adjusting-nut guard marked PAT’D JAN 4 1927
• Present configuration dates to 1927 or later if the guard is original
• Bold TRIMO logo on both sides
• Cleaned, oiled, and waxed
• Preserved original patina
• Good display or light user piece
• Strong readable markings
• Printed care sheet included