FITS:
AT1B - 1970
AT1C - 1971
AT1E - 1969
AT1M - 1969
AT1MX - 1971
AT2 - 1972
AT2M - 1972
AT3 - 1973
ATM1B - 1970
ATMX - 1973
CT1 - 1969
CT1B - 1970
CT1C - 1971
CT2 - 1972
CT3 - 1973
DT125A - 1974
DT125B - 1975
DT125C - 1976
DT125E - 1978
DT125F - 1979
DT125G - 1980
DT125H - 1981
DT175A - 1974
DT175B - 1975
DT175C - 1976
DT175E - 1978
DT175F - 1979
DT175G - 1980
DT175H - 1981