Most Grand Hinkley variations are on the backs. Type 1 had the Large GRAND on the front and a "Players Hotline" number on the back. Type 2 (which I don't have) had a Small GRAND on the front and a "Players Club Hotline" on the back. Both had Faraday mfg marks. Type 3 (the last punchcard version) had DLR CP and the 1-800-GRAND-21 and 1-800-GRAND-76 phone numbers. The card I have that I think should be Type 4, but is not in the Guide, was magnetic with a DLR CP and the two alphabetic phone numbers. My type 5 (which the Guide lists as type 4) had no mfg mark and the two numbers were 1-800-472-6321 and 1-800-472-6376. You can see why I think the Alphabetic phone number would predate this one. My type 6 (which the Guide lists as type 5) also had no mfg mark and the same numbers, but in bold type. Type 7, which was issued between my trips in May of 2001 and May of 2002, looks just like the prvious type, but a CPICA 27123 mfg mark is added. The current card, that I got last week, has a cpi 30093 mfg mark.