[crowningclassic]

I've found countless pics of these from behind but not a single one on how they look from the driver's seat, possibly too pig ugly to display?
http://www.british-customs.com/triumph-motorcycle-oval-style-mirrors-solid-stem.html

 

[Odysseus]

That is an original Triumph part, usually sold for the Speedmaster or America, but which fits the Bonnie. Maybe the Triumph website has a few pics?

Ody