I doubt those horns were original equipment, even in Canada?
In the USA, The seashell horn was standard equipment in 53-55st. It was mounted on the intake manifold in 53, and mounted on front of the radiator housing in 54/55st.
The optional dual horns 47-55st were seashell style. They were mounted on the firewall (or, other creative locations) from 47-53.
