My well worn Lupe

I used to use this Lupe when working in the electronics industry for a whole variety of things.
The Lupe is used in the weaving industry to check the warp and weft , however it is a very useful tool for looking at anything small. One circuit board product we made the warp and weft of the boards fiberglass was critical to how the component part were placed in the layout of the board.
The complete Lupe can be seen in the extra .
I also had a 10X Lupe for more critical checking which had a graticule measuring down to 0.1mm. 
Done for Tiny Tuesday