'69 Plymouth Valiant headliner.

I own a '69 Valiant and am having some refinishing done on the interior - dash, heater control and radio bezels. Having the pro's do it. The rest of the interior is in great shape. Seats, new carpet, etc. The headliner is a smooth one piece with no section stitching whatsoever. Does anyone know if Mopar made some headliners like that back in the day or was this a re-do? It is also in excellent shape and I would hate to replace it if they were stock like this....any thoughts? Thanks!