1921, Vittorio Emanuele III overprinted B.L.P. BLP Advertising letter card 'N.G.I. - Navigazione Generale Italiana' Hotel Britannia Grand Hotel' , Series 1-10 ,unused, intact advertising sheet inside., Bearing the 25c blue with type 1 red overprint, Zecchinato style.  Mi. B90 I, Sc.  B7, Yt. ER4, Sg. B114, Sas. BLP 3, VF. Estimate: $80-120