Found second alpurlite today

[Dingo]

The new one is the smaller one, I was surprised to see that it was smaller when I set it next to my older one, same amber/red filter inside.

 

[894]

Most likely nautical in origin or application.

 

[dmathieu]

Smaller/larger were diffrtent vintages. Red/ amber Alpurlites were used on DOT trucks in Massachusetts

 

[dmathieu]

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[Dingo]

Great photo, I love seeing pics of obscure lights on vehicles from the past