Two identical units each with a Polaroid disc mounted in a rotatable mount with an aperture of 25 mm. Both mounts have a pointer moving over a 75 mm diameter scale divided 0-90°-0-90°-0 x 1° .
Pocket type magnifier mounted in single body with a metal cover which doubles as a handle fitted with a single lens of diameter 18 mm with a magnification of x 10.
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