Postal Stationery items

Quality: PWST

Stibbe nr 58 and 58-Cu (both demand cards), one with normal surcharge "15" + surcharge "30" at top cancelled by black boxes, with an additional "10c carmine Mols Bilingual 1915 issue type 1" surcharged "15" rotated at 90° to the right and one with inverted surcharge "30" instead of "15" + surcharge "15" at top cancelled by black boxes with an additional "10c carmine Mols Bilingual 1915 issue type 1" with surcharge "30" rotated to the left, applied "A CHEVAL", both with "CARTE POSTALE INCOMPLETE" straight-line mark, vf/f/to be checked