Is this MacBook charger counterfeit?

I bought a supposedly original charger for my MacBookPro9,2 (A7A048) 2012 Macbook pro. It does feature the apple logo etched into the plastic, it also says > Designed by Apple in California > Assembled in China On the one side. What seems strange to me is that on another side I find mention of > DONGGUAN SOLUM ELECTRONICS CO.LTD Which appears to be an electronics manufacturer, from brief web search. Is this simply the company assembling the thing for Apple or is it evidence of a fake? Unfortunately I don't have my broken original anymore to check.