Lunometer Type M (0584)
Index: 0584
Year: ?
Maker: Peter Luhn, Wuppertal, Germany
Dimensions: 16 x 6 x 0.5 cm (etui)
Info
Tool to measure the density of fabric by using the Moiré principle.
The scale on one side is in fibers per cm (15 to 34), on the other side in fibers per inch (440 to 85). The text is German.
PS: The Moiré effect is clearly visile when opening the photo on the screen and changing the scale.
