Hi Stig,
Ok, but when you've finished with the football also checkout the following links, I think they're still good, but a bit rushed myself:
sammlung-merschroth.de/html/flieger_in_griesheim.html
which has B.842/15
and:
http://thevintageaviator.co.nz/image/tid/93
which has B.844/15
Regards,
Clint