Entex Defender (19??, VFD, 4 C Batteries, Model# ??)
Early Entex Defender, based on William's Defender arcade game. (Click here for the more common Entex Defender) I'm not sure of the story behind this version, but I'm assuming it's either an early version of it (based on the more primitive looking Entex logo), or a foreign version (becuase it shares a body style with other Gakken games). Also note that there is a Konami logo on the box, I'm not aware of Konami having any kind of Defender license (at least in the U.S.), maybe further evidence of a foreign release?
Do I have this? Yes, boxed (new, this is mine pictured).