other joint issues have been released since then. Malta has issued SEPAC stamps since 2007. MaltaPost introduced personalised stamps in 2005, and continues to offer this service as of 2020. Malta adopted the euro as its currency on 1 January 2008. Stamps issued shortly before and after the changeover (between 22 December 2006 and 28 June 2008) were denominated in both the lira and euro currencies in accordance with guidelines issued by the National Euro Changeover Committee. Pre-2006 stamps denominated only in lira remained valid for use until 31 January 2008, and they could be exchanged for euro-denominated stamps until March 2008, after which they were invalidated. The dual currency stamps issued since December 2006 remain valid for use today along with euro-denominated stamps. A definitive set which commemorated events in Malta's history was issued in 2009, and two further stamps were added to the set in 2012 after postal rates had increased. Malta issued its largest set on 10 August 2012, when 88 stamps depicting ships which had taken part in Operation Pedestal were issued. Postage due stamps Malta used postage due markings on mail throughout the 19th and early 20th centuries, but only issued its first set of postage due stamps on 16 April 1925. The first set consisted of ten imperforate provisional stamps with denominations ranging from ½d to 1/6, and they were typeset at the Government Printing Office in Valletta. The stamps had simple numeral designs, and they were printed such that tête-bêche pairs occurred within each sheet. On 20 July 1925, a new set of postage due stamps which had been printed by Bradbury Wilkinson in Britain was issued in Malta. These had the same face values as the provisional issue, and they had a design featuring a Maltese cross and were printed in different colours. This design continued to be used until after independence, and many reprints were made resulting in the stamps existing with various different paper types, perforations, watermarks and colour shades. Decimal currency postage due stamps inscribed Taxxa Postali (Maltese for "postal tax") were issued in 1973, and their design consisted of a numeral overlaid on a Maltese lace background. A final set of postage dues was issued in 1993, depicting a Neolithic spiral design from one of the megalithic temples found in the islands. Postal stationery Malta has issued postal stationery items since 1885. Postal cards (including reply cards), newspaper