10 c. proof in bluish-black on wide watermarked paper, nice fresh colour and good margins all around, tied by clear circle of bars to almost complete entire letter with adjacent red cds. "LUXEMBOURG 6 JUIL." (1853) to Ell near Redingen. Very few used proofs are recorded, all with the circle of bars of Luxemburg, this is the only recorded entire; a remarkable and attractive rarity, certificate Böttger BPP (2016)
