Vintage AO Spencer Series 25 Stereo Microscope Woth 3 Objectives

Description

According to the serial no. this microscope was made in 1947, making 75 yrs old. Back then they built things to last. there's not a bit of plastic in it. All metal and glass. It has matched 10x Bausch and Lomb wide field eyepieces. There are three objective lenses 1x, 2x and 4x Everything works smoothly and exactly as it should. It doesn't look that hot, it could use a good cleaning, but it works great. I made some photos through one of the eyepieces with my iphone. The stereo images are fantastic. Found this blurb about it :
This is a general purpose, low magnification microscope used for three-dimensional viewing in biology (sometimes referred to as a dissecting scope), assembly and inspection in industry, etc. This type of low power, binocular microscope was first designed by Greenough in 1897, and was first manufactured by Zeiss. It consists of two independent microscopes with erecting prism systems focused on the same object from slightly different angles to give an exaggerated stereoscopic view. Because of the inclinations of the optical axis of the two microscopes from the vertical, only the center of the field is in focus for both, however, the composite image appears sharp over the entire field due to the opposite nature of the focusing errors, the accommodation of the eye, and the great depth of view of the low power objectives.