What was the headstamp on the brass?

While brass that gets a bulge down at the bottom is commonly referred to as glocked brass, a term glock earned from the early gen 2 40 caliber pistols, that featured a barrel with less support around the feed ramp. They have since fixed this issue, and most glocked brass I find was not shot out of a glock. You can easily tell this by looking at the primer, glocks leave a rectangular mark with a sort off teardrop mark from the firing pin.