heres a few old photos of my great grandpa wigley in ww1, i think he's riding an old triumph, but not 100%
anyone confirm what it is?

now the reason i really want to know what it is is that today, the customer had a small collection of classic bikes, which hes invited me over to have a ride on in late september, including a 1948 bsa gold star, 1926(?) vincent, and a 1919 triumph which looks very simmilar to the one in the photo
cheers
josh