Nr.2f L.u.S. mun box

[Luftwaffe44]

Hi guys,
Can anyone tell me what Nr 2f on a Leucht-und-Signal munition box means?
Thanks,
Greetings Edgar

[BrunoH]

Hi,
Maybe 'Nr 2f' means 'Nummer 2f' for 'number 2f' but no idea about the '2f'.
Would it be possible to get a picture of it ?
Is is a card box or a wooden box ?
Regards