...
Use the information in DtSt and 260 $c to match the date. Additional explanation may be found in a 500 or 518.
Examples
DtSt:s Dates: 1999,
260 London, England : ‡b Virgin, ‡c p1999.
DtSt:r Dates: 2000,1962
260 Hamburg [Germany] : ‡b Deutsche Grammophon, ‡c 2000
500 Previously released material (p1962, p1966).
DtSt: p Dates: 1999,1939
260 Hamburg : ‡b History, ‡c p1999.
518 Recorded 1939-1950.
...