Vintage W-Nikkor 3.5cm F/2.5 Black Camera Lens Body Strap Display Decor

Vintage W-Nikkor camera featuring a compact black plastic body with textured grip panels and a fixed front glass lens assembly. The circular lens bezel is printed W-NIKKOR and f=3.5cm 1:2.5, with a surrounding black aperture ring showing f-stop numbers 8, 11, 16, and 22 and an adjacent silver band with red and black distance markings. A pale cylindrical control knob extends below the lens, while a built-in rectangular viewfinder window and side-mounted control dial frame the front design. A long black rubber strap with metal connectors is attached at both sides, allowing the piece to be hung or carried.  I don't know how to work this and haven't tested anything or opened it. Shows wear and soil commensurate with age, name plate has fallen off the front, the metal clips and bolts on strap show whitish corrosion and I'm unsure whether it works, so it's being sold as not working/for parts.  I used a program to identify and list this camera because I don't have much camera knowledge -- please ask any questions.