The previous technical reports can be downloaded here
WMM 2005 report (PDF 9 MB)
WMM 2000 report (PDF 200 KB),
UK version, with maps (PDF 10 MB)
WMM 1995 report (PDF 200 KB)
Because WMM is a "predictive only" model, we do not make the older models (WMM.COF files) widely available.
We recommend to make use of the International Geomagnetic Reference Field ( IGRF)
models for years prior to 2010. IGRF is updated retrospectively to provide the best available estimate of the
geomagnetic field back to 1900.