Western Electric first introduced the Trimline in 1965. It had an ingenious miniature dial with a moving finger-stop. Like the compact Princess it later became available in touch-tone form. The Trimline is sometimes described as the Gondola phone.

Whether Western Electric licensed the design to others or whether its design rights were rather loose, but many other companies produced phones with almost identical body shapes, with just minor variations in keyboard or switch-hook layout and sold them with names like Trimstyle or Trendline. The design even found its way to the UK with the BT Minstrel and the Mybelle Spotlight.