The comic is an adaptation of the 1844 novel "Les Trois Mousquetaires [The Three Musketeers]," by Alexandre Dumas, père.
The indicia states the title is Marvel Classics Comics Featuring The Three Musketeers.
The title page includes the credit "A Vincent Fago Production."
The on-sale date is the publication date reported in the U. S. Copyright Office filing.
Reprint information from John Haufe, CI Historian