I'm no expert in collecting dice....so if there is an expert, please chime in......

Most dice I've seen (and I'm sure there are exceptions to the rule) would stamp the logo between the 2 pips/spots on the 2 spot side of the dice. the one or 6 spot sides is where the name of the casino would go

here is an example of Playboy dice from Nassau, Bahamas (both scans from the MOGH)

http://www.themogh.org/cg_showpic2.php?cg=077912

the second example show the casino name around the 1 pip/spot

http://www.themogh.org/cg_showpic2.php?cg=092572

So, I don't know where these dice would be used at or if they are samples.