Vintage motorcycle horns

Ran across a bunch if old Motorcycle horns. A couple I am trying to identify.


The larger one is marked Lucas C8, The smaller is a Lucas 8H - 12V1165.
Would appreciate anyone who recognizes these to let me know what bikes used them.
I heard the smaller one may be a rare Triumph horn used only one year in 1967.
Thanks

Taff the Horn knows all (?).

http://taffthehorns.com/

That C8 may also be known as a 70048 or HF1441 (??).

Thanks Rohan,
Checked out "taffthehorns" web site, and was able to identify both easily.
Thanks again

The larger one looks exactly like the original horn on my '63 Atlas, but mine is marked 'C6'.

The C6 was for 6V and was a 2 pound lump which I quickly removed from my bike as it could barely be heard above the sound of the engine. Besides, twisting the throttle got more attention when I needed it.

Slick