SIOS stocks a range of Calibration Slides and Eyepiece Graticule as well as focusing eyepieces with graticules.
If you require an eyepiece graticule please advise us of style i.e. linear , squares and number of squares etc and most important the diameter required to suit your eyepiece.
We have a large range in stock or can be manufactured for us.
Walton and Beckett Eyepiece graticule for asbestos measuring.
G22 (English) as per attached pdf :G22 Eyepiece Graticules for Asbestos Fibre Analysis
R1970 (Japan) as per attached pdf :Asbestos eyepiece graticules Type R1970
Calibration slides glass76mm x 25.4mm with various rulings
Download Calibration slide:Calibration Slides pdf