OK, even though you didn't say the year or model,
you win with the Triumph answer (Model H, 1915-24).
Here's the site I gleaned it off of:
Significant Motorcycles in Triumph History
Good site, interesting history content.
Your prize?

.......
YOU have to post a Bike for us to guess the make and year!!
or, the 2010 Fiat model of your choice and color! How about a racey little Fiat 500? Rust color (or is that real?).

Zero to 60 in a matter of minutes! Rich Corinthian leather! Free tool kit!
Guaranteed 5 miles, or 5 minutes, whichever comes first!

Good Luck,
Bob