The Twin-lens reflex cameras were the YashicaMat 124 series and died out in the early 1980s, If I recall the date correctly. They used 120 and 220 rollfilm, whereas the camera mentioned in this ad was a 35 mm SLR. Though the Yashicas were not as highly regarded as the Mamiya C-series and Rolleiflex TLR models, they were quite good. YashicaMat cameras were of much higher quality than the current Seagulls, which are considered pretty much junk by serious users.
No Carl Zeiss lenses but some neat Yashica ones in Contax/Yashica mount. For some reason Yashica seems to have liked to mark theirs in odd f/stops such as f1.9. Actually those Yashica lenses have always impressed me as good sharp bargains.