nurseswim, so it is easy, as Nietsche stated, look for a portepee which resembles the overall condition of the dagger best. For unissued, best conditioned daggers it is even an option to lay an unissued, still unopened portepee next to the certain dagger.
Regards,

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.