Physical description

Grey metal boxed navigational computer, hinged lid with notebook attached

Inscriptions & markings

Under metal lid inscribed 'Navigational Computer MK. 111 D. REF. 6B/180'16
On note pad Dalton 'Air Navigation Computer, as used by Flt Lt F.P. Field Aus 4o1817 1941,46. On operations over Atlantic Ocean on 'short' Sunderland 4 engine flying boats.