Kids, In My Day We Listened to Music on Grooved Disks ...

… called "records" and I walked to school – uphill both ways!

From Michael Leddy - Zenith All-Speed Record Changer:

[Life, August 28, 1950. Click for a larger view.]

There’s something poignant about the prepared-for-all-eventualities mindset that this turntable is meant to satisfy:

First and only changer that plays any speed record now made or yet to come, 10 R.P.M. to 85 . . . with two simple controls a six-year-old can operate.

Record lovers— here is the changer that sets you free forever from the nightmare of speeds, sizes, attachments and adjustments!

Zenith engineers, who revolutionized record reproduction with the world-famous Cobra® Tone Arm, have now brought you an automatic changer — the new “Cobra-Matic” — so unbelievably simple that you simply won’t believe it until you operate it yourself!

You touch one control knob — and set it for any size record — 7, 10 or 12 inch! You touch the other control knob — and set it for any speed! Yes, for 33 1/3, 45, 78, or any speed from 10 R.P.M. to 85 that the modern world may dream up! You can play them all — with one marvelous new Super-Cobra Tone Arm — not even a needle to adjust, not even one single attachment to fuss with!