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A scarce matched pair of mid-century advertising calendar plates issued by Rock River Oil Co. of Galt, Illinois, representing consecutive years 1960 and 1961.
Produced on American-made Sabina Line porcelain blanks, each plate features warranted 22K gold trim and finely detailed calendar layouts, reflecting the promotional marketing style of regional petroleum companies during the early 1960s. These were not retail items, but distributed as functional advertising pieces—making surviving examples increasingly difficult to source, particularly as a matched set.
The two plates present a subtle design evolution:
• 1960: more ornate, scrollwork-driven composition
• 1961: cleaner, more modernized layout
Together, they form a cohesive snapshot of small-town Illinois business history and mid-century design transition.
Condition
• Light surface wear consistent with age and handling
• Minor wear to gold trim in areas (typical for 22K application)
• No cracks or major chips observed
• Displays very well with strong visual presence
(Please review all photos closely for exact condition.)
