Malta-Gibraltar Joint Stamp Issue 2010 made with the assistance of the Malta Heritage Trust (known in Maltese as "Fondazzjoni Wirt Artna").
First Day cover set of 4 stamps posted 19 February 2010
Stamps show views from the 1880s & 2010 of the RML 17.72 inch '100-ton' Guns found in Gibraltar and Malta.
Collectors items; limited edition - last few available.