Vintage Sierra Designs Terra Tent. I am unsure if this tent is the Terra III or IV but I am going with III as it appears it would sleep 3 more comfortably. Here’s what Sierra Designs had to say about the then in a piece of promotional material for it:
“Sierra Designs Terra III and Terra IV geodesic domes. These tents incorporate strength, simplicity, and real value. Designed for comfortable, rugged three-and four-season use and built with Sierra Designs’ renowned attention to detail and high quality? Come on in and check ’em out for your self !” click here to view original postcard.
In pieces this assembling this tent looks a little bit daunting, but as noted in the instructions it is in fact quite simple to pitch and nearly impossible to mess up.
Measures approx:
84 inches across
80 inches deep
48 inches high
Weighs approx: 8 Lbs
Includes: directions, 1 extra pole, 3 extra rings/discs, 2 extra ferruls, 3 extra nylon cords, 5 stakes (1 missing). Small vintage Camp 7 stuff included as the parts bag.
Basecamp Vintage & Archives 
Hi Rob,
I just got a Sierra Designs Terra III from ebay, but there are no paper instruction together with the tent, do you mind scan the front and back side of the paper instruction of yours and share with me? Appreciate your time!
Unfortunately I do not have this tent anymore. Feel free to use the image here. In retrospect I should have photographed both sides. Sorry about that.