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: IMBC SSP TBF SHIT MEG BYO WHWF ABS YLD XTF RAC RET 79922 DTSS FAB