Which groundbreaking product design innovation did Dieter Rams create for Braun in 1962 that later directly inspired Apple's original iPod design?

Throughout history, certain product design innovations have fundamentally changed how we interact with everyday technology. Some designs were so revolutionary they defined entire product categories and influenced decades of subsequent development. This question explores one such pivotal moment in consumer product design history that transformed an industry and created new user experience paradigms.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

The T3 pocket radio with circular control dial
The SK4 record player with transparent lid (Snow White's Coffin)
The Sixtant SM31 electric shaver with minimalist button layout
The KM 32 kitchen machine with modular attachment system