− Decrease quantity for Sudan (PS106b) Siege of Khartoum, 500 Piastre, 1884, hectograph signature, PS106b but printed on Egyptian postal stationary linen backed, scarce, EF Quantity + Increase quantity for Sudan (PS106b) Siege of Khartoum, 500 Piastre, 1884, hectograph signature, PS106b but printed on Egyptian postal stationary linen backed, scarce, EF Add to cart