for illustration only
British 12 Pounder 12 cwt. Gun on High Angle Mark IX Mounting (Bangor Class Fleet Minesweepers & Trawlers)
Warship Data International L/0/13
Detailed plan in the series on ships (L/S) and armament (L/0) drawn by John Lambert and produced in the 1970s and 1980s. Search using 'Warship Data International' for other plans.