Their Royal Highnesses
The Prince and Princess of Wales

Woven on Silk:-

on image of the Prince of Wales:   UNITY OF EMPIRE   GREATER   BRITAIN RD. No. DUKE. 369618

on image of the Princess of Wales:   UNITY OF EMPIRE   GREATER   BRITAIN RD. No. DUCHESS. 369619

Printed at bottom of card:-
WOVEN IN PURE SILK.
 
THEIR ROYAL HIGHNESSES,
The Prince and Princess of Wales.

Card-mount:
cm deep by cm wide

silk:
cm high by cm wide (each)

by Geoffrey Godden:
Godden does not record this title.

Other comments:
This silk comprises the individual portraits of The Duke of Cornwall and York, and The Duchess of Cornwall and York mounted together in a single card frame.

This same silk was originally issued with the title "Their Royal Highnesses / The Duke and Duchess of Cornwall and York ", which is recorded on this site as go23, whilst Edward and Alexandra were the Prince and Princess of Wales.

After Edward became king, the Yorks became the Prince & Princess of Wales, and although Grant issued these as individual titles, the actual silks remained the same.
Hence, whilst the silk above records the title as THE PRINCE AND PRINCESS OF WALES, the individual silks are those of the Duke & Duchess.