a simple google search says:
Classic Power Series #3 USRA 2-8-8-2
Ebay Search:
- Classic Power Series #4 Northern Pacific A class 4-8-4
- Classic Power Series #7 Van Sweringen Berkshires
In My Collection:
- Classic Power Series #5 was the PRR Q Class of Duplex Steam engines
- Classic Power Series #6 was the Many faces of the PRR K4
- Classic Power Series #8 was the PRR M1 Mountain Class of Steam Engines