Sekor Z 50mm W for RZ67 elements count?

So I got this lemon from Japan for a few dollars, glass is clean enough but the lens is not focusing anything. Seems to me like a misplaced inner element. Anyone got a diagram of this lens so that I can check if the glass is all there? How many elements should I expect to find? Thank you

Vade mecum list two 50mm lens for RZ, an 11 glass 9 cemented and a 15 glass, 11 cemented, both f4.5.
See pdf page 10 of http://www.cameramanuals.org/mamiya_pdf/mamiya_rz67_interchangeable_lenses.pdf
zoom up to 300% to 400%.

wow thank you! was hoping for less glass though