Six20 C Mod 2 Convex Concave

This Six20 Model C, hasn't got the cleanest meniscus lense, but I have used it with this coated Soligor middle lense element taken out of a 135mm lens.I think it's a Convex Concav or Negative Meniscus It makes the focal length about 6". Love the images it takes. Here it is concave forward. Reversing is a whole new ball game.