4 Aug 1914 WAR MEMENTO Button Pin ONE POUND BANK NOTE
Round button pin with brass frame and paper inside tab with words, A MEMENTO OF THE WAR with a ONE POUND Bank Note likeness over date AUGUST 4th 1914, shows age dulling to the paper but all details can be made out. 32mm across. Pin back with pin catch missing. I would say likely issued for a BOND Drive or something similar.