What's the procedure for naming a new, earliest die stage?
I've been collecting a series of 2000-P Virginia error quarters that fall into eight die stages (A-H). I've just discovered another error quarter struck by the same die pair that represents a die stage earlier than Stage A. What convention is typically used to designate a die stage that precedes what was previously the earliest known die stage? Do I call it Die Stage A-1? That sounds more like a brand of steak sauce.