Maybe these will help a bit. First of all FY1 RT/SE is correct on all accounts. These are the belts from my 1970 440+6 Cuda, it's an LA built car, Scheduled Production Date of 2/12/1970. The car is a bench seat car. These belts had never been removed until i took them out, they are still grimey but never touched originals, all but two labels are there and readable, the ones missing were duplicates on multi-strap assemblies with more than one tag so it's easy to tell what they should have been.