Indicia states Vol. 2 No. 1 but there is a space after the one and then a comma, indicative of the fact that it should have been 16. This is a war years book (WW II) when some pages were eliminated from the back portion of the book.
The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1943, New Series, Vol. 38, No. 2.