All of my Silver Slipper red match covers have the slipper facing right.
Each match cover pictured is different in some way.

All of my Silver Slipper black match covers have the slipper facing left.

This unusual red one faces to the left. It's a 20 strike and 1½ inches wide.

I remember Don Lueders bringing up this subject in the past.
I don't remember which red Silver Slipper match cover he has that faces left.