This is a single NOS fender beading for a notchback - rear right hand side.
OEM-Nr.: 311 827 716 A
In general:
They're probably 50 years old, handle them with care. Install them in a heated garage, or warm them up with a hairdryer (not with a heat gun in order to protect them from melting!!!) This will help massively because they'll get softer then and you can stretch them carefully - just a little bit if needed. If they don't stretch easily, leave them as they are. Some colored fender beadings get softer than others - we don't know why. NEVER EVER try to stretch them at the heat welded areas!!! Please note: Once they're installed, they don't need to be felxible anymore!