Reddit reviews Staedtler(R) Engineers Printed Scale
We found 1 Reddit comments about Staedtler(R) Engineers Printed Scale. Here are the top ones, ranked by their Reddit score.
12-Inch triangular scales are ideal for engineers and engineering studentsThree sides with six different scales feature die-engraved graduationsEasy-to-read, printed graduations will not rub offColor-coded grooves allow quick and accurate selection of the desired scaleEngineer triangular scales are fully divided: 10, 20, 30, 40, 50, 60 parts to the inch. Scales are made of high-impact polystyrene plastic
The sides are divide by parts of the inch. In your picture, the top is tenths of an inch; the bottom is 50ths of an inch. the other sides will say 20 30 40 and 60. This was made sometime before the marks were changed after German reunification in 1990. When the marks changed depends on the company. Source: I have both the engineer and architect scales from Staedtler from around 1991 and they are marked W. Germany. See a similar item here
Edit: you were looking for /r/whatisthisthing