This Kiev 4 has no edge of rigidity on the top of the ligntmeter.
Known such cameras on the site :
s/n # 57 1478 (Aidas)
s/n # 58 04172 (dee)
s/n # 58 04953 (Michel L.)
s/n # 58 05356 (Michel)
s/n # 59 1074 (Alain)
s/n # 59 3947 (Michel)