I will be posting pics in the coming weeks of several rifles I will be selling soon as I have time to do so but this is an easy one to describe on the off chance someone recognizes what it is.

On two of the 99s in my possession there is a circle with a triangle in it touching the edges on the top of the reciever. I havent located this symbol in any of my books. Any idea what this might mean?

In addition one of the circle/triangle receivers just above the stock on the right side of the receiver is a stamp of I think it says "NACo" or "HACo". Its very small and hard to read and doesnt look like Japanese characters, I doubt I could get a good camera shot.

I am at work or I would give more details.