Casio - ‘Casio tells time that's music to your ears 12 different ways.’
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Year: 1980
Brand: Casio (USA) 

File Under ︎ Simple and straightforward copywriting

ONE thing this ad does well (AKA Copywriting Tip):

Don’t make vague claims. Use cold, specific product facts you can communicate numerically in a memorable way.

⇝ “Casio tells time that's music to your ears 12 different ways.”.