38' Conv. Coupe Top Iron-What Goes Here?

[Thirtyeight]

I need help with what these are and if anyone has any of these to sell. I recently bought a rough 38' Convertible Coupe. I am showing three pieces of what appears to be alloy parts the single pictured piece is broken off it is one of two on each side of the top iron and I don't know what they looks like or what they are for?

The other two pictures are of 4 of what I would say are again some kind of alloy that join together 2 each left and right where the horizontal portion of the top irons below the driver and passenger window curve down to the 1/4 panels.

I know these are rare already but what year of application were they used? Thanks for you help with this one.