The card Prefix X Series 473 you already have on file with partial photos does NOT in fact have the prefix of X
New Card details as follows:-
Set Title and 1st use date UNKNOWN
Card Title Soldier arm in arm with lady on blue dress
Card Comment NEW YEAR GREETINGS
Artist H Payne
Card Measurement 10.2 cms x 15 cos
Thick card with gold edge trim, monotone vignette on reverse
Series 473 (shown in database as X 473
There are obviously more cards in the set, suggested Set Title Army Courting Couples
Any queries please let me know
Regards
Jack