Man pages matching name bmptoppm in section 1:

bmptoppm.1.en	debian 10 / netpbm
bmptoppm.1.en	debian 11 / netpbm
bmptoppm.1.da	debian 12 / manpages-da
bmptoppm.1.de	debian 12 / manpages-de
bmptoppm.1.en	debian 12 / netpbm