LOEWENSTEIN Knoll Style Mod Chair possible Eames Era

I have obtained 3 of these chairs at an estate sale. All 3 are in MINT CONDITION. From what I can see, they are made of wood or wood grain, metal/chrome, and I believe the textile on the chair is vinyl or possibly a leather blend. The wood on the back "shell" is a beautiful continuous curve. The label on the bottom is pictured- LOEWENSTEIN. The Manufacturer date is blank on all 3.