(These are the cookware types as we use them in describing parts)

Dutch Oven

The domed lid typically distinguished the Dutch oven from an ordinary post/stock pot. 

Sauce pan

Skillet

Square Skillet

Saute pan

The sides perpendicular to the bottom distinguish a saute pan from a skillet.

Pressure Cooker

Note the two types of pressure cooker above which differ in that one has a pressure guage and one has a simpler adjustment knob.

Griddle

Process Patent Stamp

General rule: All cookware with a process patent stamp is what we call vintage but some vintage has a slightly different version of the stamp shown above. Any cookware without the words process patent and the circle in the stamp above are not from the vintage era.