At 78 years old I'm old enough to remember actually needing and using these prismatic wonders. In '54 when my dad purchased our new Pontiac family car, complete with a windshield visor, it was equipped with one of 'em. The viewer impacted me strong enough that I can still vividly recall all the details today. So fast forward 67 years and I send off for a fresh repop for my '50 Chevy truck that needs one due to having a big, bad windshield visor. What I received was so disappointing I sent it back for a refund. We have a couple of threads regarding 'Traffic Light Viewers' but from the comments so far it seems like many lack the experience to know how well the 'Viewers' should work. The problem is, these are clear, cast, plastic, and the repops aren't made with any attention to shrink causing them to have an inch wide dimple smack dab in the middle of the lens. So they are nothing like those originals. If you're old enough to remember what a Fench Curve is....... that's how the surface of the lens is supposed to flow from bottom to top; not the bent dogleg of these repops that render totally useless what should be the 'sweet spot' in the middle of the lens. Attached is an example of the distortion. We should be able to see actual definition, not an undefined smear. (I took some other photos, some of red lights, but this shot illustrates the problem best. Much of the image is sucked into a "wormhole" because of the misshaped lens.) Buyer beware. Save your money and get a 'survivor' original. Rant over.