In 2021, NBS updated its 20-22.1 Human Transportation class, adding Air, Land, and Water subclasses.
This mid-20th century, reverse intaglio mounted-on-metal button with circumflex shank features a very early automobile, representing a mode of land transportation. With unique characteristics such as the rear-engine, vertical steering column, the shape of the fenders, and the control lever on the left-hand side, this car is identified by William James Hentges to be an 1894 German Benz Velo (Wikipedia) without a rear-facing seat.
The above is based on the National Button Society's Classification System.
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