A rastrum 😳

 

An historical music pen, known as a rastrum (or ruling pen), which features five parallel nibs designed to draw a complete five-line musical staff in a single stroke. 

Before pre-printed staff paper became widely available and inexpensive, composers, copyists, and musicians used specialized fountain nibs or dip pens like this Charlet-Mottie model from Paris to manually rule consistent musical lines on blank parchment or paper quickly and efficiently.

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