Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Scale rule
Scale rule "D" 1/12(1in:1ft) 1/24 (½in:1ft). Black print on light cream card.
Cardboard scale rules were cheap and inaccurate but commonplace from later 19th Century to c.1950's for use by draughtsmen, surveyors etc.
Pwnc
Diwydiant
Rhif yr Eitem
1994.65/3
Mesuriadau
Meithder
(mm): 30
Lled
(mm): 320
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.