Lot
660 
Réunion, 1852, 15c Black on Blue, type II, four large and balanced margins, deep paper color, cancelled by manuscript on 1854 cover from St. Denis to Mauritius, "St. Denis, Il Bourbon, 10 Avril 1854" cds on front and additional strike on reverse, black "Mauritius, G.P.O., AP 19 1854" crown circle arrival postmark; file folds and some minor erosion, stamp lifted and hinged in place for examination (signed by Brun and Calves), Very Fine, ex-Burrus, Walske; signed by Behr, Brun, Calves and Sismondo, with 1989 Holcombe, 2004 Calves and 2016 Behr certificates. Scott No. 1 $45,000.
AN EXCEPTIONALLY RARE USE OF THE 1852 15C BLACK ON COVER TO MAURITIUS.
The 15c stamp prepaid the 15 centimes internal postage rate for up to 7.5 grams from the city to the harbour according to the schedule that came into effect on January 1st 1852.