No, I think you're in luck Dave. I'm pretty sure it's from a Hill of Howth tram
EDIT: it took some time to find evidence to back that statement up....
http://irishphotoarchive.photoshelter.com/image?_bqG=3&_bqH=eJxNjk0PATEQhv_NXlysC5H0UN1aE7T0Y2NPEwQVYTerSPbXazeCw7zzvJnPzaP2WEzO01vbtPf03OL65C_HjRutx.lgnPb7MYICZpoRV7286_lme00AGZiShKwNNTwCk1YYVSJoGa1UwEWogRTRgkbFF5xqnn3s6t9rqQxRVMyT7hRSkREf2GquEDJi4xuu3g2fu1lV2yqUClDG0gXSnAtWxqYE2QQhLA6jH7RfVNMfLiNSZsj9sG32Lim66bxTFvUN0D9Vow--