Where is the company, which built the roller coaster Comet, based?
Comet (Hersheypark):  Built in 1946 by the Philadelphia Toboggan Coasters (PTC) of Philadelphia, Pennsylvania, the coaster features a double out and back track layout. Philadelphia Toboggan Coasters:  Based in Hatfield, Pennsylvania, it was established in 1904 by Henry Auchey and Chester Albright under the name Philadelphia Toboggan Company.
Hatfield, Pennsylvania