Hey Bruce: Was out at the shop to the shop yesterday and took some photos of the "Helve" end of the pick and it's definitely oval. I also dug out some photos of my old HUP and there is your "cup" on the back. I would say it's oval, but it was also made of very thin sheet metal, as you can gather by the photo. I'll go out on a limb and say mine was original. Hope these photos help.
Cheers.....Robert
