A diamond and platinum engagement ring and wedding band

The ring set with a brilliant-cut diamond in a four claw-setting, to a double tiered surround of brilliant-cut diamonds, on shoulders set with further similarly-cut diamonds, together with an engagement band, designed as a half hoop eternity ring set with a row of brilliant-cut diamonds, both mounted in platinum, diamonds approx. 1.58 carats total , maker's mark 'AG', European convention marks on the ring, maker's mark 'CPM', Birmingham hallmarks on the band, ring sizes L