Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Test message slip for New Beam System
Full title - New Beam System England and South Africa, July 4, 1927. Purple code on cream slip of paper with handwritten details in pencil on the reverse : final test slip for the inauguration of England and South Africa New Beam High Speed Wireless System - short wave - July 4th 1927.
Pwnc
Diwydiant
Rhif yr Eitem
34.219/5.1
Derbyniad
Donation, 20/4/1934
Mesuriadau
Meithder
(mm): 12
Lled
(mm): 265
Deunydd
papur
Lleoliad
In store
Dosbarth
communicationNid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.