| Gulf Nails are great fun to hunt.There are 3 varieties of Gulf Oil Nails. The Round Gulf is the most common. Then there is the Round Gulf with the P/L (Pipe Line) hand stamp on it. The rarest one is the Diamond Gulf. I believe it can be dated to around 1923 due to the number of IC1923 Nails found with them. | |
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| This nail is found on old Humble Oil & Refinery oil leases. Humble Oil & Refinery is now known as "Exxon". The H O & R nail is a Hubbard dating to 1934. | |
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