Shutter can be released, but the shutter button cannot be pressed. The shutter can be released by pressing the shutter-linked lever on the side of the lens.
Rear lens is possibly 90mm wide angle not original setup. On the back lens there is small smudge in corner see last two pictures. Untested, for parts or repear.
F 13.5cm 1:3.5 No. 262068 The Nippon Kogaku Nikkor Q. 260403 lens is part of the Nikon NIKKOR series and has a Nikon S mount. Beautifully manufactured, it is in excellent condition.