1958 Merchant marine, 1961 Crown Prince, 1970 International relations, 1986 Olympian Gods (perf + imperf) and 1988-1989 two side imperf stamps (all sets) plus 1990-1992-1994 Capitals of prefectures (imperf) plus 1996 Europa (imperf) and 1996 and 1998 Greek Castles (imperf) in complete sets on unofficial First Day Covers. (Hellas 791/796+863+1170/1174+1719/1730+1719A/1730A+1788A/1835A+1856A/1870A+1916A/1927A+1958A/1967A+1998A/2014A+2070A/2079A).