"USO 1.8-10x" brings up all sorts of stuff. Including that reticle in images.
That one has the side parallax adj. (TPAL) and the repositionable erector (EREK) --that's the wide flat elevation knob. If you get it make sure you learn how to properly zero that scope. There should be a top cover with lines on it for zero and another black one with two screw holes in it. Basically you wanna position the erector so that you get maximum elevation adj. plus a few mils under.
It was a pretty cool scope. It's heavy though.
I considered selling my SN3, 3.2-17 milGAP, loaded. Like yours but bigger and with a different reticle. But after comparing it to a new 4-16 ATACR, the $1200 they typically go for just didn't seem worth it and I decided to keep it. Long and heavy with a dated reticle but it still looks crisp and gets the job done.
I might let my SR8 go though, PM me if interested, I can probably give you a better deal but it is a different scope, more basic tree reticle that works more like a circle and dot at low mag.