Hockey Card Help - 1996-97 UD Black Diamond Triple Diamond

Hi there,
Just wondered if anyone out there knows anything about this hockey set - 1996-97 Upper Deck Black Diamond Triple Diamond? I'm looking for a description of this set and I've looked seemingly everywhere and even called Upper Deck. They didn't help.
Specifically, I would like to know at what ratio these cards were included in boxes? I have heard one in every 30 packs. I have heard one in every box?
This is the set with the Joe Thornton rookie in it.
Can anyone help? Or direct me to a hockey card board?
Thanks.
Just wondered if anyone out there knows anything about this hockey set - 1996-97 Upper Deck Black Diamond Triple Diamond? I'm looking for a description of this set and I've looked seemingly everywhere and even called Upper Deck. They didn't help.
Specifically, I would like to know at what ratio these cards were included in boxes? I have heard one in every 30 packs. I have heard one in every box?
This is the set with the Joe Thornton rookie in it.
Can anyone help? Or direct me to a hockey card board?
Thanks.
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Comments
This helps a lot.