Master Lock Key Value Guide

This mid-20th-century Master Lock key represents the industrial heritage of the Milwaukee-based company founded by Harry Soref in 1921. Collectors prize these keys for their robust construction and their role in the brand's early innovations in American padlock security.

What affects the value of Master Lock Key?

• Material composition, as solid brass examples are often more desirable than standard plated steel versions.
• The presence of original serial numbers or model codes that correspond to specific vintage padlock series.
• Physical condition, specifically the clarity of the stamped text and the lack of significant wear on the bitting.

How to Identify Master Lock Key?

• Look for the 'Master Lock Co.' or 'Master' branding stamped clearly into the steel or brass bow.
• Check for 'Milwaukee, Wis.' or 'Made in U.S.A.' markings which are characteristic of the 1940-1960 production era.
• Identify specific keyway patterns and numeric codes often engraved on the blade or head of the key.

History of Master Lock Key

Master Lock Company, founded in Milwaukee, Wisconsin, in 1921 by Harry Soref, quickly became a prominent manufacturer of padlocks. Known for their robust construction and innovative designs, Master Lock keys and padlocks have been a staple in security for homes, businesses, and personal belongings for decades. Early keys like this one are often sought after by collectors interested in the brand's heritage.