Apache campers have quite an interesting history. 

Apache produced eight different camper models in 1975. Those models are apple green. The Ramada is one of the largest models. It sleeps eight. At the time, the base price at one Illinois dealer was $3070.  (Links to weights, pricing, and specifications can be found here.) It’s nearly 21 feet from end to end and has 127 sq ft of living area. 

Manuals for the 1975 Ramada are hard to find. Here’s a link to 1976 Ramada which is pretty similar. This link takes you to a downloadable PDF.