Originally Posted by
Dan Fromm
By both the VM's and P-H Pont's Ross chronologies your lens is post-WW II. Should be coated, should be a tessar type.
Recognizing tessars is easy. Pictures such as you posted are unfortunately no help at all.
Here's the test: unscrew one cell from the shutter. Hold each cell under a light bulb and count reflections. The front cell should have four strong reflections, one from each air-glass interface. The rear cell should have two strong reflections. If it really is a tessar type, it should have one weak reflection from one glass-cement-glass interface. If the myth is true and the real cell is a cemented triplet, it will have two strong and two weak reflections. The weak reflections may be hard to see.
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