L1917.5KHz, 1917.5KHz, CRYSTAL, BOXED, DATED 1959, FROM, Admiralty Surface Weapons Establishment, ASWE, Admiralty Research Establishment,ARE,
L1917.5KHz, 1917.5KHz, CRYSTAL, BOXED, DATED 1959, FROM, Admiralty Surface Weapons Establishment, ASWE, Admiralty Research Establishment,ARE,