This is like a portable Dark Room for photographic work.  

It is probably from the 1970s because my friend was into photography in his late teens early 20s. After he bought his house in mid 1970s his interests moved elsewhere. So, it is about 50 years old, but appears to be never used.

It is 17.5" x 16.5" not including the elastic sleeves.  Elastic is still strong.

It is a double layer bag with a zipper for each layer.

Made in Japan