Думаю что с ПМВ не изменилось ничего, хотя надо еще поискать
Вот немного из Плимута
(правда даты невыяснены) http://www.cyber-heritage.co.uk/badge/badge.htm http://www.cyber-heritage.co.uk/badges/
И вот такие примечания:
The designs are very often very old, basically starting off in a form we know today in 1919, and the badge on a ship today may be virtually identical to that on a vessel of many years ago. The design may only be changed by express permission of the Admiralty.