As stated by Tom T. and Tom M. the grain on the 63 & 64 pieces was the Seville grain pattern and the 65 was the Madrid grain pattern.   The differences in the years I was referring to were differences in the configuration of some of the actual trim pieces and the brackets that hold them. From trying to assemble the pieces for my own car, being sold the wrong pieces for my 63, disassembling my seat, disassembling seats from the other years and information I have read on other posts
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