IBM ThirteenStripe Pins found in Germany pin collection  
ThirteenStripe IBM Customer Advocate Team CSO - pin #234
See 
http://mypins.de/ibm/pin_htm/pin234.html

ThirteenStripe IBM Customer Advocate Team CSO - pin #234
See
http://mypins.de/ibm/pin_htm/pin234.html

Description : Comments from www.mypins.de - the online reference indicates: CSO means Customer Support Operation. Pin given to resolution owner for developing a complaint management tool.