The rectangular plugs and the 2 dot vertical plug may look a little odd forna Vader saber but its a real vintage camera flash, really close and just the american version. You could make your version.
If the accuracy bug infects you, keep it for a custom saber made with old inaccurate parts that are quite frankly still cool quality saber parts in and of themselves
Personally, i would nab one for a custom saber if it was less than 60 bucks. Anything much higher is a little bit of an investment for such a common item not conntected to filming