LA 360 piston ID

The bottom looks like the base of a dome that was milled down and it reminds me of the 11.5-1 domed pistons that Direct Connection use to sell. But I can't place the dimple in the middle, unless it is an OEM hi-compression 340 piston.

Even the "Hoover's Mover" (Tom Hoover- father of the Hemi) 360 from the '70's had to have its OEM 340 low compression pistons milled top and bottom to make them work. This was before aftermarket performance pistons for the 360 were readily available. I did build a couple of 360's using DC's Nascar 355 pistons which were made for something like a 3.454" stroke crank. Worked out pretty well with higher compression & lighter weight without compromising strength.

Can you get any pics showing the bottom of the pistons to see if the wrist pin bosses were milled for counterweight clearance and might be able to tell if it's cast of forged?