It's always dangerous to generalise but would it be fair to say that only promos has the three XXX on the play side ? I have seen promos without them, obscure-ish record that wouldn't warrant being booted. Never seen an ordinary issue with those crosses. Sound about right ?

That sounds right.  I have promos on Duke, Backbeat, Peacock and Sure Shot with the XXX.  I don't remember seeing any without, but can't really be sure about that latter statement.  No time now to check all my records on those 4 labels.