Here are advertisements for Sony cassettes and the Walkman that appeared in magazines from the 1970s to the early 1990s, during the heyday of cassette tapes. Readers over fifty may have seen them before.
Around 1973. Duad

An advertisement for Duad, one of Sony’s representative ferrichrome cassettes.
1978. AHF, BHF and CHF

For many people, AHF, BHF and CHF were the cassettes that defined Sony.
1979. METALLIC and 1978. AHF, BHF, CHF

METALLIC, released in 1979, was Sony’s first metal tape.
1984. HF-ES and Over Night Success

The mid-1980s HF-ES advertisements featured young people aspiring to reach Broadway. A memorable television commercial also ran to Teri DeSario’s song Over Night Success.
More Sony Over Night Success commercials on YouTube
1984-1985. Do, HF-PRO, UCX and UCX-S

Do, released in 1985, was Sony’s first affordable High Position tape. The first HF-PRO, a high-end Normal Position cassette, appeared in 1984. UCX and UCX-S High Position tapes were sold at the same time.
1987. HF-ES

An advertisement for the third-generation HF-ES, released in 1987.
1985. Walkman

By the mid-1980s, many different Walkman models were available.
1993. Super Metal Master

In 1993 Sony released Super Metal Master, its ultimate cassette tape.
1987. HF series and 1993. Super Metal Master
