ArtMetal

Gene, I suspect the Nikrasoff bowl is a combination of raising, chasing and embossing. The bowl appears to be rather deep. I have examples of circular trays that use the same process you used to create volume and some depth. They were made by a yet unknown craftsman who signed his work J.Braun with and awl and hammer. I too made a test using only a flat sheet adn then chasing in six spirals from the center and then bossing out the backside. I will post image when I can.

Thanks for sharing the image of the original copper piece.

Fred

Fred Zweig
Metalsmith