Vintage Burgess Dolphin Automotive Spark Plug Test Light and Lantern with Leads

Description

Vintage Burgess Dolphin Automotive Spark Plug Test Light and Lantern with Leads
It has a cable that goes between a Spark Plug and the Plug Wire to make sure you are getting Spark to the Plug
It looks like it can double as a lantern, I think the bulb is burned out, I hooked the Red & Black wire to a 6volt battery I have and it did not light up. I did not test any further