[Günther Ott]

Thanks for your efforts, mhuxt and Jaap. The problem is exactly that there are several possibilities for V 7595 since the second letter is apparently missing. The rough area was likely mid-channel, so that wV7595 would be the best choice. However, vX and vZ in British Cassini Grid cannot be excluded, same as vL and vG in the Nord de Guerre zone. They are all combined with the letter v and all would have covered also some portions of mid-channel areas.

Günther