Product number (P/N): MK51 (MK-51),
Keywords/Tags: MK51 (MK-51)
Date of intro: ~1982, Origin: USSR (List), Dimensions: 130x70x8mm, Weight: 110g,
Number of keys: 37, #Key-Black: 20, #Key-Red: 2, #Key-White: 15,
Classification: / Pocket,
Featuring: Scientific functions, Square root, PI,
Serie-members: ELEKTRONIKA: MK51 (version-1) (Half upper part of case black); ELEKTRONIKA: MK51 (version-2) (Semi upper part of case black); ELEKTRONIKA: MK51 (version-3) (Silver, Yellow LCD-display); ELEKTRONIKA: MK51 (version-4) (Silver, LCD-display, also Brown Keys); ELEKTRONIKA: MK51 (version-5) (Silver, LCD-display, also Gray Keys); ELEKTRONIKA: MK51 (version-6) (Silver, LCD-display, also White Keys, Black switch); ELEKTRONIKA: MK51 (version-7) (Silver, LCD-display, also White Keys, White switch),
Collector value: 7/10,
Internet: Link-1: VIRTUAL MUSEUM OF CALCULATORS, Link-2