Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym EF-40 is...

EF-40 is

  • Extremely Fine 40 (coin grade)

EF-40 is also in:

Acronym Definition Searched: WCHV FW TOT 65058 WA WAOK DF CGP DLH DET VFN LLA BGA BVN JCS