Frow the Wagner and Griswold forum admin
The kettle is most likely circa 1850's.
Cresson & Co. is a foundry that went thru quite a few evolutions and name changes over time, from the 1840's forward. Philadelphia.
Your question sent me on a researching binge, and once I sort it all out, the results will be added to the WAGS Foundry list, on the members side of the forum Smiley to compliment the existing information we already have.