Hassler Shock Absorber Letterhead - Circa 1920s dated Automotive Americana - Auto Parts Letter

Letterhead for Boston, Massachusetts based shock absorber company. Stain at left edge.

Robert Hassler is credited with constructing the Indianapolis Motor Speedway in 1909.

A shock absorber, also known as a damper, is a mechanical or hydraulic device designed to absorb and dissipate shock impulses. It achieves this by converting the kinetic energy of the shock into heat, which is then released. Shock absorbers are typically a form of dashpot, a damper that resists motion through viscous friction.