Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Photograph (print)
Three photographs attached to card showing a design of panotype matrix 'A', manufacture of panotype matrix 'A', and completed type matrix.
Pwnc
Diwydiant
Rhif yr Eitem
42.229/4 - 6
Creu/Cynhyrchu
unknown
Derbyniad
donation, 8/8/1942
Mesuriadau
mount
(mm): 337
mount
(mm): 151
Techneg
Black and white (monochrome photograph)
Photograph
Deunydd
Paper
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.