It may be no more than personal preference, but I have always found it easier to create the gallery first, whether on the lid or the body, then match the other part of a lidded jar to it. For an over-edge style lidded pot, this means that you will begin with the lid first.
First, clearly envision or sketch the completed form of the lidded jar. You need this in order to know what size and shape to make your lid.
The lid is thrown upside down. What will become the top of the lid is trimmed once the lid is leather-hard. If you wish to form a handle while trimming away the excess clay, you will need to throw the lid as if it has an extravagantly thick floor. Another option is to attach a handle onto the lid after it has been trimmed.
On a second bat center enough clay to form the lid, plus up to about one pound of extra clay as desired for a handle. Or, if you prefer, you can center much more clay and throw the lid off the mound as is being done in the photograph. Keep in mind as you work that the lid's wall should be the same thickness as the jar's wall.
Open the lid but do not straighten the walls. You can see in the photo that there is a bulge of clay below the rim on the outside of the wall. This will be used to create the gallery.
