Hi,
This picture shows the exactly construction of MO-1-180 cannon without protective mask.
Here larger resolution –
http://img247.imageshack.us/img247/2691/m01180abt7.jpg
Soviet MO-1-180 coastal artillery batteries :
No 411 – Odessa, 3x180
No 412 – Odessa, 3x180
No 29 – Kerch, 4x180
No 431 – Batumi, 4x180
No 317 – Northern part of Eesel island (Baltic), 4x180
No 905 – Nakhodka, 4x180
No 982 – Vladivostok (Russian Island), 4x180
No 901 – Vladivostok (Popov Island), 4x180
No 902 – Vladivostok (Russian Island), 4x180
No 905 – Vladivistok area (Tungus Point to the West of America Gulf), 4x180
No 110 – Vladivostok area (Povorotny Cape to the East of America Gulf), 4x180
Alkali