Mechanical Dotted Line Pen Precision (0699)
Index: 0699
Year: 1st half 20th century ?
Maker: Richter & Co, Germany ?
Dimensions: 6 x 1 x 6 cm
Info
Drafing tool to make perfect dot-line lines by rolling the toothed wheel against a ruler.
References/Links/More Info
Youtube - How to use (David Grimes)
