AB Engrossers ruler

This is a ruler designed by Aquino da Silva, it's a very handy lining tool for Engrossers and copperplate. The ruler is suitable for daily practice or lining on small cards and envelopes. Place this instrument against a ruler, place the pencil point in the little holes and slide it horizontally in order to trace the lines for ascenders, descenders and x-heights (from 3 to 7 mm and a 55-degree slant angle).

A tutorial for using this product is available on YouTube by copying this link:

https://youtu.be/6M9hKFuwJYs?si=bjR99zh_eoI_SbAC