The Optonica ST-3535 is a tuner released by Sharp's Optonica brand during the mid-1970s, specifically manufactured from 1975 to 1979. It was marketed as the US version of the Optonica ST-3000 and featured a sleek silver design. The original price of the unit was approximately 778 Deutsche Marks. The ST-3535 is part of a series that includes a variety of audio equipment, such as amplifiers and other tuners. It represents a segment of consumer electronics during that era, focusing on delivering quality AM/FM reception and tuning capabilities that were characteristic of the time. The model is often mentioned alongside other products in the same series, including the Optonica SM-3000 and SM-4000 amplifiers, indicating a coordinated product line aimed at the burgeoning home audio market of the 1970s.
