The Lynx works perfectly and I'm shooting Ilford HP5 400. The Electros needs some work around the battery; I installed a 164A battery but the light meter on both cameras did not work.
Yashica Lynx 14E - Camerapedia
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The Yashica Lynx 14 was introduced in 1965. ... speed: all speeds; TTL flash: no; Motor drive: no; Battery: PX625A (for model 14) or PX640A (for model 14E) ...
Yashica Lynx 14E - Camerapedia
camerapedia.wikia.com/wiki/Yashica_Lynx_14E - Traducir esta página
The Yashica Lynx 14 was introduced in 1965. ... speed: all speeds; TTL flash: no; Motor drive: no; Battery: PX625A (for model 14) or PX640A (for model 14E) ...