I am racking my brain trying to remember what the name of this vintage item I ha

Question:

I am racking my brain trying to remember what the name of this vintage item I have is? It is sort of like a?

It is sort of like a viewmaster...it is wooden, you hold it by a wooden handle and pass picture cards thru it.. I know I am not making it clear what it is but I don't quite know how to describe it. The cards were made by The World Wide View Company. Thanks for your help.

Best Answer - Chosen by Asker: stereoscope