Four Wheel Brakes Warning Sign

This triangular ferromagnetic metal sign was used in the 1920's on the rear of cars sporting new four-wheel brake technology.  The sign was a warning to any car behind them that they could stop very quickly!

Condition: Very good - used.  The paint finish is a deep red and black painted lettering is still intact.  Minor clipping on corners, and paint wear, mostly on edges.  See photos for details.

Dimensions:
Width - 4.75" each side.

Weight - 20 grams