This search result turns up plenty of matches. Granted, some pictured have PAINTED labels but there are some with paper labels like your bottle would have had.
https://duckduckgo.com/?q=vintage+7-up+bottle+quart+green+paper+label&t=ffab&iax=images&ia=images
You could date the bottle based on the Owens-Illinois marking on the base. You will find discussions in this forum which explain how.