Linen Tester ¾"x¾" square area at 6x magnification.
Excellent for examining fingerprint evidence.
Glass lenses set in a brass fold-out frame. Edge of frame is marked in fractions of an inch. May also be used for examining documents.
Middle item shown in photo.
Forensics Lab Supply Number 3540331.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
Optical Microscoy Primer