Stewart-Warner Portable Hand Tachometer Model 757-W Value Guide

The Stewart-Warner Model 757-W is a quintessential 1950s mechanical diagnostic tool used by engineers to measure rotational speeds. This portable hand tachometer is highly collectible due to its robust American craftsmanship and its iconic mid-century yellow and blue tin packaging.

What Is Stewart-Warner Portable Hand Tachometer Model 757-W Worth?

The typical price range for Stewart-Warner Portable Hand Tachometer Model 757-W is $75 - $85 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• The presence and condition of the original yellow and blue tin packaging significantly increases the market value.
• Mechanical functionality and the accuracy of the needle response when applied to a rotating surface.
• Cosmetic condition of the metal finish, including the absence of rust or significant paint chipping on the instrument body.
• Completeness of the set, including any original rubber tips or attachments used for different shaft interfaces.

How to Identify Stewart-Warner Portable Hand Tachometer Model 757-W?

• Verify the 'Model 757-W' designation printed on the instrument face or the exterior of the tin packaging.
• Look for the authentic Stewart-Warner branding and 'Made in U.S.A.' stamps on the metal housing.
• Confirm the presence of the original yellow tin container with its distinctive blue lid, which is specific to this era of Stewart-Warner tools.
• Check for the mechanical needle movement and the specific dial increments used for measuring shaft or disk RPM.

History of Stewart-Warner Portable Hand Tachometer Model 757-W

Stewart-Warner, an American manufacturer with a rich history dating back to 1905, became renowned for its precision instruments, particularly in the automotive and aviation industries. Their tachometers were essential tools for mechanics and engineers to measure rotational speeds of shafts or disks, crucial for tuning engines and machinery. The Model 757-W was a popular and reliable portable unit, favored for its accuracy and robust design, allowing for on-the-spot diagnostics. These instruments represent a bygone era of mechanical ingenuity, before digital readouts became commonplace.