Newly issued Irish postage stamps are available from the Philatelic Bureau of An Post in the Dublin, General Post Office. Commemorative and special issue stamps are usually available for one year from the date of issue. Until the mid-1960s the Irish stamp-issuing policy was very conservative, with only a few new ones each year; up to four or five commemoratives, usually of two values, plus the occasional updated, or new, definitives. During the 1970s and beyond, the quantity produced rose considerably.