SASANIAN KINGS. Khosrau I (531-579 AD). Silver Drachm (4.12 gm; 30 mm). "TP or TWP" mint, year 3. Khosrau's bust turning right, name in front of face, reverse; fire altar with attendants (reverse style only for years 1 through 5), mint "TWP" or "TP" (Tpuristan/Tabraistan? to the right, year three to the left, unrecorded mint for the reign. Choice EF. Lightly toned. Extremely rare.