This cool coaster I do believe is Val St. Lambert although I have not found any with these markings. It's kind of hard to read but this is what I think it is, FCT13 ESL and then at the bottom Solidovute' and I believe 1975.
There are no chips or cracks, some light use wear scratches on the edge. This is 3 5/8 inch wide.
Item ID: RL706
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