One for the P Series,
Most people are familiar with the P-Series handle (P-10-HG) released with the original Corningware that hit the market in 1958. (The lids may have changed from Fin style to Knob style in 1960, but the handle remained unchanged)
Then in 1972 Corning changed the shape of Corningware. It was more square, flatter on the bottom (though not actually "flat ground" like the Electromatic skillets and Cookmates) and had tighter fitting lids with larger knobs on the top. But most importantly, as far as handles are concerned, they changed the width of the "lug" that the handle attaches to. Thus, a new style of handle was needed..... The A-10-HG.
Another thing that should be noted, is that not ALL of the A-Series "casseroles" are able to take a handle. You can attach one, but it is not stable. This has to do with a change made to the lugs. I am not sure when this change was made, but I have a feeling that it happened with the conversion from quarts to liters as a unit of measurement.
This is the back side of the original A-series lug.
Now, let's discuss the lesser known handle. The P-201-HG. This handle should probably have been designated a B-10-HG, because it was available for the round Buffet Servers, Centura Cook n' Serve and Merry Mushroom Pieces, all of which are B series pieces (this also includes the Spice O' Life round as well).
NOW, all that being said.......
I had heard rumors for years that the original P-10-HG and the A-10-HG came in white, but I had NEVER seen one in person, nor had I even seen a picture of one. That is until now. Below is the 601-H handle designed for the original Centura Saucepans designed by Jerry Wright to accompany the release of Centura Dinnerware.