Maybe this is the one (has the recall, return information, etc.):
IMPORTANT SAFETY RECALL NOTICE - February 20, 2009
DESCRIPTION OF THE HAZARD: Smith & Wesson has identified a condition that may exist in certain PPK and PPK/S pistols which may permit a round to be discharged without the trigger being pulled. When the manual safety is disengaged, Smith & Wesson’s Product Engineering Group has determined that the possibility exists in certain firearms that lowering the hammer may cause a chambered round to fire.
This recall applies to all Walther PPK and PPK/S pistols manufactured by Smith & Wesson from March 21, 2002, until February 3, 2009. The Serial Numbers of the pistol subject to this recall are as follows:
0010BAB - 9999BAB
0000BAC - 9999BAC
0000BAD - 9999BAD
0000BAE - 9999BAE
0000BAF - 9999BAF
0000BAH - 9999BAH
0000BAJ - 9999BAJ
0000BAK - 9999BAK
0000BAL - 5313BAL
0000BAM - 1320BAM
0000LTD - 0499LTD
0001PPK - 1500PPK
0026REP - 0219REP
0001WLE - 0459WLE