The Reynolds 531 decal indicating "butted frame tubes" would be consistent with a 61x, corresponding to what JohnDThompson said. The H Lloyd Cycles Reynolds decal timeline says that decal was used from 1982 on. My 1982 614 has the slightly earlier decal, but since 1982 is a boundary year that doesn't really mean much.
As other have said, the serial number will probably settle everything.