Technical Old Spotlite Bulbs

I am looking at buying an excellent example of an pre-sealed beam spotlite. But there is no bulb. I dont have the manufacturer of the spotlite, but I know it wasnt Appleton. Is there anyway to find out the correct bulb to find for the early 6v spotlites? Or will any early 6v bulb that fits do?

Thanks!

 

Try N.B. Pease Antique Auto Parts. 1-413-283-7620

 

I have a light i got and used a Harley Davidson fog light lamp in it. Theres lots of options for your bulb/light

 

^Harley Davidson part number: 68715-49 (6V) and 68715-64 (12V)

 

Probably could check what the cop cars use.