Microcon

Microcon is an annual science fiction and fantasy convention, held annually at the University of Exeter in Exeter, Devon, England since 1982, usually over the first weekend in March. It is organised by the Exeter University Science Fiction and Fantasy Society.

(As the numbering increased by five in just four years, it appears likely it jumped a digit during 1984 - 1986)

Microcon's misnumbering in the mid-1980s (see above) was spotted during research for Steve Green's 2008 guest presentation.