Geoff,
A good shot of the langet eagle.
If you are familiar with patterned glass there are three types that come to mind:
Pressed glass that is blown into a mold that has a design on it. This would be similar to cast or perhaps even some die struck parts.
Cut glass that has no design when taken from the mold and a design is then cut into it. This would be similar to hand chased designs on a backstrap, ferrel, or guard. It might also apply to hand die struck embellishments such as acorns or eagle.
Press Cut glass that has a pressed design from the mold but then has hand cut sections. The pressed areas are sometimes cleaned up with a wheel by hand or embelishments are simply added to the pressed design.
This glass analogy might be similar to what Ace is talking about.
George