https://www.edmundoptics.com.sg/f/horizontal-micrometer-scales-transmission-reticles/11647/
Horizontal Micrometer Scales Transmission Reticles | Edmund Optics
Horizontal Micrometer Scales Transmission Reticles used to superimpose the scale on the image under a microscope are available at Edmund Optics.
horizontalmicrometerscalestransmissionreticles