It should have 30 inch barrels. If you go to the main page
www.parkerguns.org and on the left side of it you will find link to areas that will provide you with some valuable Parker knowledge; identifying information as well. In particular, links to Research Letters, Technical Information, Parker Identification and Parker Grades. The FAQ section may hold some notes of interest too.
You may want to search the forum for threads on modifications to Parkers. It's all educational.
Thanks for posting pictures, we all like to see them.
Enjoy your Parker!