Veteran Triumph from c1908 - Vintage and classic motorcycle

I'm slightly hesitant to identify this machine as a Triumph but that is what it looks like to me, from around 1908. Perhaps someone can comment or get in touch to confirm or deny the identification. If it is indeed a Triumph it is a mildly customised one, it looks like the pedal cranks have been removed and the petrol tank has had a different paint job.