EL-NIKKOR 1:4 f=50mm No.604221
- production year 1968
- «Nippon Kogaku Japan»
- «LENS MADE IN JAPAN» on scalloped aperture ring («M» with vertical sides)
- apertures 4 to 16
- 8 iris blades
- NIPPON KOGAKU 34.5mm snap-on front lens cap
- EL-NIKKOR bubble case, «NIPPON KOGAKU K.K.»
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