Do you recognize this box?

[Thelgemo]

Does anyone know what this box or rack is called or what it was used for?

 

[turbowoodworker]

Really old CDs?

 

[txvwnut]

Its hard to tell size but I'd be more inclined to say 8-tracks.

 

[jagwinn]

Perhaps glass slides; magic lantern slides.

 

[Old Man Roger]

Its hard to tell size but I'd be more inclined to say 8-tracks.

Looks about the right size..lol

 

[jagwinn]

Slides: