Hello, I have had passed on to me a lense, in prontor-press shutter, marked "JML 56mm f1.9". A rough ground-glass test says that it covers 2x3 (at least, but not much more) at infinity, and it's coated with a definite blue on both front and rear elements. No other identifying marks that I can find. Any ideas what this is? It's small, light, and appears contrasty on the GG, though it will require a 2" deep recessed board to be used on the Burke and James. Time to adapt it to an old Kodak tourist and use as a pocket camera?