These were bought because I thought I might need the extra height but I didn't. So they were taken off and put back in the box within days of purchase.
They are Redfield (Denver Colorado) that I bough some time ago as "new old stock" from eBay USA. Back when all you could get in UK were standard height rings except at an exorbitant price!
Complete with the four "torx" screws and the "torx" key. The clear plastic sleeve covering the whole box is missing. But the price is good! £13.60 including Recorded Delivery within Great Britain and Northern Ireland.