Wow, very nice combo! I agree with jstout66, I worked in a TV Sales / Service shop at the beginning of the SYSTEM 3's, and until 1981, we were Factory Authorized Zenith, RCA, and Sony Sales and Service. I helped deliver, set-up, and of course repair many new Zenith's (and RCA's), we never had a combo set on the sales floor, we could have ordered one special for a customer, but no one ever bought one while I worked there! Now, looking at that beauty makes my knees, and lower back ache!
Really nice for the price, and I really like that the 8-Track still works, I've kept my machine going since I bought it new in 1977! Enjoyed the pictures of your fine Zenith Combo!