Look to be machine pressed on thick old card. They do look the part in a collection (see end photo as I added one to mine).
Keep calm and carry on vintage retro advertising kilncraft mug cup
WW2 Keep Clear Unexploded Bomb Advertisement 12 x 8 Inches
Vintage WW2 Berlin Road METAL SIGN German Army WW2 Military Steel Repro Plaque
Vintage WW2 Sound Powered Telephone MFG Company MK19 (XlX). ROYAL NAVY.
Pre loved Vintage WW2 Large 1941 Dated Ammeter By Nalder Bros & Thompson, London
Vintage WW2 Photo. Rawalpindi Arsenal 1942. Captains Farewell party - Military
