Jack in the Box store number 683 (1504 Texas Avenue South) opened in 1976. The picture isn't high resolution because I was going to publish it as part of the Texas Avenue City Directory on the next update on Carbon-izer. It's all part of a big site overhaul. The picture is from me, but I don't have the date recorded down of when I took it (likely a few years ago). This is the only Jack in the Box in College Station proper as the one on Rock Prairie closed down a couple of years ago.
UPDATE 11-07-2020: Updated opening date based on new evidence and added a bit on the rebuild.
UPDATE 08-06-2021: Changed date to 1976 and also added [1970s] (instead of [1980s]) to the tag.