Antique Edwardian Diamond Platinum Feather Tiara

An Edwardian diamond tiara, mounted in platinum, set with old-cut diamonds, with a central, suspended diamond, surrounded by two rings of diamonds, in millegrain edged rub over settings, flanked by lattice work, with diamonds set at the intersections, with a diamond set surround, featuring leaves and diamonds in millegrain edged rub over settings, circa 1905.  With a pipe at the back to take feathers.