PRIMERA EDICIÓN 1977 URSS "ZENIT-TTL" S/N 77006066 CÁMARA SLR, lente Helios 44m f2/58
This is an early first-issue ZENIT-TTL, manufactured during the initial production years (1976–1977). It features the original shutter speed dial without the later-added ISO reminder, a trait found only on early versions.