Fire engine/horse drawn fire engine, lenticular flicker/flasher picture

Description

This is a rare vintage flicker/flasher picture of a horse drawn fire engine that switches to a more modern fire engine as you move it (lenticular). It has a bit of history on the back.
There is a light stain on the back but it doesn't detract from the printing on it. All in all i
t is in great condition and the colors are still vibrant, yellow, red, black, white and light blue/green.  It measures 1.25 square and is 1/16" thick. I'm not sure what it was originally made for but I've had it a very long time. I don't believe it was meant to be attached to something because of the printing on the back. All in all it's a very cool piece of fire fighting history and a great collectable.