I believe that this is a brass GREAT NORTHERN RAILWAY lock & key
Great Northern Railway pattern signal lamp interior Peterborough North
PHOTO KNOCKMORE SIGNAL BOX EXCHANGING TOKEN GREAT NORTHERN RAILWAY IRELAND (GN
PHOTO (2) KNOCKMORE SIGNAL BOX GREAT NORTHERN RAILWAY IRELAND (GNRI) DUNLIN AMI
PHOTO KNOCKMORE SIGNAL BOX AND LEVEL CROSSING GREAT NORTHERN RAILWAY IRELAND (G
PHOTO (2) KNOCKMORE SIGNAL BOX AND LEVEL CROSSING GREAT NORTHERN RAILWAY IRELAN
PHOTO LISBURN SIGNAL CABIN - LAST NIGHT BUILT BY THE GREAT NORTHERN RAILWAY (IR
