The Thunderbird vintage silver hallmark is a Dennis England creation. An interesting note…England lived only approximate 1 mile from Thunderbird Lake in Oklahoma…undoubtedly an inspiration on both Thunderbird hallmarks he created during his 3 year active campaign between 2006 – 2009. (The early crude Thunderbird hallmark can be seen here.)

  • Company Location(s): Midwest Refiners, Oklahoma
  • Dates of Operation: Early 2000's
  • Known Bar Sizes: 3.5, 3.8, 4.6
  • Related Refiners: Dennis England

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