got my fingers crossed with 7 pc same modell outstanding Carl Zeiss jena Militäry eyepieces with a fieldstop of 40 mm. Comparing this eyepieces at daytime with other famous same or similar focallenght modern Ultrawideangle eyepieces, we found that this 30 mm show zero distortion, ultracomfortable viewing , nearly same visible field at objects, than N31. The eyepiece are Zeiss coated, have an build in focusing and beeing used. A few very smallest scratches can be found on the glas inside if you look very critical, which is not visible if you look through the eyepiece on your scope attached.
we selling each for US $ 250 plus shipping