i live and was born at DUNKERQUE ( DUNKIRK ) and my grand father who as starded the collection was born 10 kms to DUNKERQUE.
i was to young , 48 years old , but i never see the bridge, the lighthouse is unknow too....
but DUNKERQUE was totaly bore during WW2 and i was born in 1961....
sorry i can not help more . the only thinks i know from my grand father was that RNAS was based in DUNKERQUE during WW1 to protect the harbour of german attack (plane and zepelin)
there are a lot of naval wreck , but from operation dynamo in 1940 (little chips)