The St Kitts and Nevis sprinter, 38, ran a season`s leading best time of 6.52 seconds despite having only the seventh best reaction out of the blocks of the eight competitors.
The 2003 world outdoor 100m champion, also twice a world indoor 60m silver medallist in 2003 and 2008, was pushed all the way by Briton James Dasaolu.
Dasaolu, reigning European 100m champion and 60m silver medallist in 2013, was beaten into second by thousandths of a second in a savage dip of heads at the line.
American Mike Rodgers, who served a nine-month doping ban in 2011, came in third in 6.58sec.
Das PSD Bank Meeting Düsseldorf 2015
Rank Athlete Nat Result React.time
1 COLLINS, Kim
2 DASAOLU, James
3 RODGERS, Michael
4 ADAMS, Harry
5 BLUM, Christian
6 JAKUBCZYK, Lucas
7 RICKS, Keith
8 ZHANG, Peimeng