The Vignette is of King George Vl
Your image would possibly be (AFTER) the head engraved after Great Britain coinage, (vignette "c") modelled by H. Paget from a portrait taken especially by Bertram Park.
Shown here by Vignette "a" (Newfoundland)
Engraved Portraits of George Vl
British Postage Stamp Design
Author John Easton
Page 325 (Plate XXXV)
MCMXLVll (1947)The book is ex library, "The Convent School" Exmouth Western Australia,
presume some aspiring young lady philatelists.