K.L.M Royal Dutch Houses - most canal houses, 24 housed filled and unfilled with jenever of Bols. These houses are given by the K.L.M to people flying 1st class. Some have damage on the cork. The house numbers are house number 1 unknown, house number 4 unknown, house number 6 former Saint Peter House open cap, Middelburg, house number 8 Oudezijds Voorburgwal 1 Amsterdam, with cork unsealed. House number 9 Leidsegracht Amsterdam. 2 x house number 12 Zandhoek Amsterdam, sealing less flawless. House number 19 Boerhaavehuis Leiden 2 x, of which 1 sealed 1 with cork. House number 20 Edam museum Damplein Edam, sealing less flawless. House number 21 The Salamander Delft. House number 22 Het Lammeren Veere house. Number 30 Hippolytusbuurt Delft. House number 31 Koornmarkt Delft. House number 34 Het Gulden Tonneke Delft. House number 46 Begijnhof Amsterdam. House number 47 Anne Frank Huis Amsterdam. House number 57 The Ster Herengracht Amsterdam. House number 58 Herengracht Amsterdam. House number 60 Herengracht Amsterdam, with cork. House number 71 Singel Amsterdam. House number 74 Reguliersgracht Amsterdam. House number 75 Headquarters K.L.M Amsterdam. House number 80 De Drie Fleschjes Amsterdam.