Zeiss Ikon Focusing Screen Set f. Contarex 4x in Box

focusing screen 20.1310 with micro-prism ring and split-image indicator (for lenses 25-180mm), focusing screen 20.1311 with micro-prism ring and split-image indicator (for lenses frpm 250mm), focusing screen 20.1313 clear screen with double-line cross (micro-screen), focusing screen 20.1320 with micro-prism spot in plastic case with tweezer and brush.