These files are in PFA (PostScript Font - ASCII) format, and the file names exactly match the font names.
/usr/lib/DPS/outline/decwin: AvantGarde-Book LubalinGraph-DemiOblique AvantGarde-BookOblique NewCenturySchlbk-Bold AvantGarde-Demi NewCenturySchlbk-BoldItalic AvantGarde-DemiOblique NewCenturySchlbk-Italic Courier NewCenturySchlbk-Roman Courier-Bold Souvenir-Demi Courier-BoldOblique Souvenir-DemiItalic Courier-Oblique Souvenir-Light Helvetica Souvenir-LightItalic Helvetica-Bold Symbol Helvetica-BoldOblique Times-Bold Helvetica-Oblique Times-BoldItalic LubalinGraph-Book Times-Italic LubalinGraph-BookOblique Times-Roman LubalinGraph-Demi
Corresponding Adobe Font Metric (.afm) files can be found in the /usr/lib/font/metrics directory, although curiously, the file names there have all been converted to lowercase, and hyphens have been changed to underscores. Font metrics are provided in both Adobe Standard Encoding, and in ISO Latin 1 encoding, e.g. courier.afm and courier_isolatin1.afm.