Yep, that's an Irish Rifle reticle. AI bought back Irish L96's in p[art exchange for AW's. 35 I believe, the details are in Steve Houghton's new book, and sold them off to the US. The scopes were sold off separately and many are still in the UK, including yours.
So it's a genuine AI scope, but not from a British L96. Not as desirable.
£500-700 if you can find the right buyer I would say