We think this knife might have been made for the passenger liner RMS Arlanza, when she returned to civilian duties after service with the Royal Navy in the First World War.See https://en.wikipedia.org/wiki/RMS_Arlanza_(1911) for more infomation on the ship.We do not know which manufacturer made the knife.If you have any information about the knife or the maker, please share it with us via enquiries@hawleytoolcollection.com ....