Description
75th Anniversary Exhibition 13 – 16 Sept 1972 Marconi-Kemp Wireless Experiments 1897
Dated 15 Sp 72
Cachet on front of cover in green – Posted at Marconi’s Original Hall Street Works
75th Anniversary Exhibition 13 – 16 Sept 1972 Marconi-Kemp Wireless Experiments 1897
Dated 15 Sp 72
Cachet on front of cover in green – Posted at Marconi’s Original Hall Street Works