I saw the ad a while ago and I think I found some info on the what and where of the panther, for examples, listed here:
http://www.detektorweb.cz/index.4me?s=show&i=3394&mm=1&vd=1&PHPSSIDW=58f5bd83f3774ca038fdce648d611766
and here on page 4:
http://the.shadock.free.fr/Surviving_Panthers.pdf
It will make a nice project for somebody