Half-wave rectifier, Type NU4, Admiralty Pattern 7415
Hard half-wave rectifier, Type NU4, Admiralty Pattern 7415, Serial Number Y2936, 1943
Two hard half-wave rectifiers, Type NU4, 1943-1944
Hard half-wave rectifier, Type NU4, Admiralty Pattern 7415, Serial Number Y2936, 1943
Hard half-wave rectifier, Type NU4 CV 1260, Serial Number Y6489, 1944