Watchmaker Hairspring Holder

Used for resting hairsprings of watches or clocks on when manipulating. The cross hairs are set up to make it easier to work out 90% angles to adjust spring.
The idea of this is the height raises it up enough that the shadows of the spring are out of the way and white to make it easier to see.
If you can find 50mm flat torch glass this is all I have used, but if you cant get it a 50mm mineral watch glass will do too.
Made for 1.5mm thick glass but should work with 2mm thich glass without a pr