Old 36ga two inch shot shell?

[Bindlestiff]

I was visiting my nephew this week and he had some old shotgun shell boxes on a shelf in his kitchen. I pulled one down and looked it over, I have never seen one like it. The shells were unusual to me too.

The box is marked 410 as well as 36 gauge and 12 m/m. I have never seen (may noticed would be better) any shot shells marked 36ga.

A "normal" 410 shell that I have used were all 3 inch shells. I don't remember 2 inch shells. But, I must state that my only exposure to 410 shooting was when I started hunting 57 years ago and my dad let me use a single shot Iver Johnson 410.

I wonder how unusual these shells are?