I am only familiar with plastic floral ones from the 1930's, exactly like yours but marked: "Made in Japan." Could yours be Czech, using molds originally intended for Japanese plastic floral designs? And, maybe the figural pieces are just Czech?

https://www.google.com/search?hl=en&tbm=isch&source=hp&biw=1280&bih=679&ei=hcMAWtHFKoW2jwOI7argCg&q=Japanese+molded+bracelets&oq=Japanese+molded+bracelets&gs_l=img.3…4572.10471.0.10660.27.26.1.0.0.0.136.2450.19j6.25.0....0...1.1.64.img..1.13.1287...0j0i30k1j0i8i30k1j0i10i24k1j0i24k1.0.km8H1r8I2mY