MALDIVE ISLANDS 1990 Provisional surcharge 3r50 on 2r60 ERROR DOUBLE SURCHARGE

1990 Provisional surcharge 3r50 on 1985 2r60 Dhoni error Surcharge double unmounted o.g. This mystery surcharge believed to have been issued in 1990 when 3r50 became a required postal rate was first reported on the 2r70 value in GSM April 1995 (p.86) and this stamp in GSM November 2007 (p.124). Mentioned in footnotes to SG1108/15. Minor traces of toning but very small numbers appear to have survived… Purchased from Stanley Gibbons (still on their card)