The first few annuals from 1954-1960 are pretty common. 1961-1964 seem to be scarcer. 1961 is when laminated covers came in and this one in particular is tough to find.
You sometimes find a 1976 annual with no date on the cover or spine. A printing error. See also Thunder annual 1974.
Not really any extra value, just for completists.
Note: some PR issues may have no value. Selected issues in FN, VF or VF/NM may not exist in some titles.