The on-sale date is the publication date reported in the U. S. Copyright Office filing.
The issue is the first published appearance of Josie James and Melody Jones, later of "Josie and the Pussycats" fame. Some sources claim the first appearance was a story in Archie's Pals and Gals #23 (Winter 1962-1963). However, the copyright records do not bear this out. She's Josie #1 was published on December 10, 1962; Archie's Pals and Gals #23 was published on December 17.
Josie, Melody and Pepper had been created by Dan DeCarlo for a proposed newspaper strip called "Here's Josie." when it didn't sell as a strip, he took the characters to Archie Comics and got the go-ahead to do it as a comic book.
Using the three girls as the foundation for the new comic, DeCarlo developed the characters and their supporting cast in conjunction with writer Frank Doyle. DeCarlo told TheTrades.com in 2001 that "I designed all the characters, and Frank Doyle was doing all the writing."
The four stories in this issue form an issue-length story arc. Most of the early issues of this comic tried to distinguish themselves from the regular Archie brand by telling book-length stories or giving some larger theme to the linked stories in the issue.
The introduction of Sock, the big brawny guy with a crush on Pepper. He started out as very similar to Moose, but later became more intelligent and sensitive.
One of many 1962-3 Archie stories that refer to President Kennedy's call for the youth of America to get more physically fit.
In the final panel, the shortest of the boys running after Melody is a caricature of Dan DeCarlo. Self-caricatures of DeCarlo would become a running gag in many of the pre-Pussycats "Josie" issues.