Regimental cards were a sure-fire seller, such as the rousing, patriotic, example shown here.
Logistics would confine the sale of them mainly to the home front, where it was much easier to establish the whereabouts of specific regiments and thus target their camps for sales.
This Royal Garrison Artillery example would not have been cheap, with its embossed gold emblem,…
…as you can see from the reverse.
Full colour Gloucester Regiment card (the reverse shows nowt),…
…and a final example featuring a kilted private of the Black Watch,…
…this card again sent from within the U.K..