The first four of these photos date from 1967, by which time 7-Eleven was beginning to vary their store appearance. The open front design was beginning to be phased out, and many of the existing open front stores underwent renovation to a more conventional window and door arrangement. This was ostensibly to allow the efficient use of newly-added air-conditioning units, but one could assume it was done to address security concerns as well.
Most of the new designs included some form of mansard roof with architectural shingles. Spanish tile was used to nice effect on selected Western and Florida area stores, and some even had cedar shake roofs. A very attractive colonial motif (complete with a rooftop cupola), pictured in the third photo, was implemented in a number of the company’s Eastern and Midwest markets, including Chicago.
I remember the colonial design well, and in at least one instance that I know of, Southland applied it to an entire shopping center, called (appropriately enough) "The Southland Center", which opened in late 1967 on Algonquin Road near the Wilke Road intersection in Rolling Meadows , a northwest suburb of Chicago. This center, in addition to having a 7-Eleven, housed a snack shop (which I remember much more than that particular 7-Eleven), a beauty shop, barber shop, and a number of other small stores. It had a two-story section in the middle, where Southland’s Chicago-area regional offices were housed. It still stands, but sadly the colonial façade has been refaced with stucco (an all-too-common fate of 50’s and 60’s era shopping centers) in a style I like to call “yecch modern”. Hilariously, the cupola still exists as before. Southland, the 7-Eleven and all of their original tenants, like Elvis, have long since “left the building”.
The last photo is from 1968 and shows a sign with the company’s brand new logo, no doubt a very familiar sight to all because it's the same one in use today. Behind the sign is a Southland –owned “Midwest Farms” dairy truck, sporting the new image that Southland rolled out for all of its dairy divisions that year.
Update 7/17/10 - Thanks to AB for identifying the location of the Spanish-tiled store in the second photo - still operating as a 7-Eleven at the corner of Las Olas Boulevard and 16th Street in Fort Lauderdale, Florida!