Standard Cab vs Deluxe Cab - how do I know which one I have?

[Asshat]

This is a 1963 C20, and the cab has only one armrest on the drivers door. This makes me think it is a Standard Cab, however, I am not sure. It also came with the standard heater, and the window glass does not have a metal frame around it; small rear window.

Are there any other indicators to determine one or the other?

The reason I am asking, I am looking to buy a weatherstrip kit for the windows, and the catalog from The Truck Shop (Orange CA) lists these two options.