documentclass[a4paper]{book}

usepackage{lipsum}
usepackage{geometry}

geometry{twoside=true,landscape,%
layoutwidth=300mm,layoutheight=217mm,layouthoffset=60mm,layoutvoffset=30mm,showcrop,showframe,
    bindingoffset=5mm,left=32mm, textwidth=197mm,marginparsep=4mm,marginparwidth=47mm,%
    top=35mm, bottom=49mm,heightrounded,headheight=10mm,headsep=7mm,footskip=10.5mm,%
    a3paper,}
begin{document}
lipsum[1]
end{document}

geometry{twoside=true,landscape,%
layoutwidth=300mm,layoutheight=297mm,layouthoffset=60mm,layoutvoffset=0mm,showcrop,showframe,
    bindingoffset=5mm,left=32mm, textwidth=197mm,marginparsep=4mm,marginparwidth=47mm,%
    top=35mm, bottom=49mm,heightrounded,headheight=10mm,headsep=7mm,footskip=10.5mm,%
    a3paper,}

documentclass[a4paper]{book}

usepackage{lipsum}
usepackage{geometry}
usepackage{tikz}

    geometry{twoside=true,landscape,%
    layoutwidth=300mm,layoutheight=297mm,layouthoffset=60mm,layoutvoffset=0mm,showcrop,showframe,
    bindingoffset=5mm,left=32mm, textwidth=197mm,marginparsep=4mm,marginparwidth=47mm,%
    top=35mm, bottom=49mm,heightrounded,headheight=10mm,headsep=7mm,footskip=10.5mm,%
    a3paper,}

begin{document}

lipsum[1]

tikz[remember picture,overlay] {%
draw [blue,line width=5mm]
(current page.south west)
rectangle
(current page.north east)
}%

end{document}