Wolfgang You may well be right - the style is consistent with early 20th c. And the Lusitania was the most famoous/infamous sinking off the Irish coast in the first world war. At one stage, while teaching sailing in West Cork, I used to visit a tiny Protestant church in a village called Castletownshend - to look at some wonderful stained glass, mainly. Anyway: propped up in the doorway of the church is an oar which was washed ashore from the Lusitania in that area.
Regards