The Concuspidor's "Lucky" Dominoes:

face-up on the table: a double six, a six/four and a six/five

edge-up, before the players: mainly blanks and low values

[Actually, there are fewer high value tiles than is usual for a standard set of dominoes, a discrepancy which is made up by the Concuspidor's extra supply of pips. In this way, he is able to manufacture the high numbers according to demand, which avoids any of those tiresome lulls during the game when, for example, he is "unable to go".]