Yes that is definitely a WWII blackout bulb, and these do occasionally come up on eBay but not so commonly. I am not sure how much they sell for, but I got my Wabash blackout bulb on eBay over 3 years ago for maybe $5. May I ask you, what is the shape of your blackout bulb? Is it shaped like a radio tube, or a regular light bulb? If it is shaped like a radio tube, chances that it is a Wabash bulb. If it is shaped like a regular bulb, it is either a GE or Westinghouse. Oh also, they do come in several colors, not just one. Mine is orange, but I do know they made reds and blues as well. Hope my info helps!