Reference

ps2pdf13(1) on Linux

The text 704698b7524b, as Debian 3.1 (Sarge) shipped it.

Convert PostScript to PDF using ghostscript ps2pdf12 - Convert PostScript to PDF 1.2 (Acrobat 3-and-later compatible) using ghostscript ps2pdf13 - Convert PostScript to PDF 1.3 (Acrobat 4-and-later compatible) using ghostscript

ps2pdf13(1) on Linux now