Jumble Sale: 1970s Morley Thinline Optical Volume Pedal

This 9V-powered optical pedal eliminates the pesky scratchiness older pot-based volume pedals can get. It also gives you an on/off bypass switch and a trim control that lets you set just how much volume is bled-out at fully-depressed. That is a really cool feature because it makes it easy to use as a "manual trem."

I'm guessing this is late '70s or early '80s in make.

It's in great shape, working 100%, has only the most minor wear and tear throughout, and comes with its original heavy vinyl bag.