Lot
2476 
France, Alsace-Lorraine, 1870, 5c yellow green, burelage reversed, in combination with 1870, 10c yellow brown (N5) on folded letter sheet to Mainz, Germany, all tied by neat "Metz, 11/9, 71" cds's; 10c with some blunt perfs at top from cover overlap, otherwise Very Fine, a rare on cover usage of this key occupational issue; with 2017 Roumet certificate. Maury No. 4b+5. Scott No. N11 Estimate $500 - 750.