Hi Charlie,
Welcome the the Parker Gun Collertor's Association web site and forum. Hopefully if you passed your Parker to your grandson he would some decades from onw do the same.
Your GH was made in 1925 and should have automatic ejectors and a capped pistol grip stock along with the 32" barrels that you listed.
We do have a section of this forum for PGCA members where they may sell their Parkers and other fine shotguns and collectables. The $40 membership fee is usually made back in their first sale. Our for sale section in not an auction. One must state their price. If smart, they may do that after obtaining their fellow member's opinions of how much their Parker is worth. When you deal with a PGCA member buying your Parker, you have a 99.9% chance that there will be no issues. A deadbeat would not last long in this crowd!!!
If you desire opinions concerning how to quantify your Parker's condition, rarity, and price, please shoot detailed photos of the entire gun to include:
1. Muzzle of the barrels (capturing the bead and end of the top rib and where the barrels meet as if you were looking into them),
2. Barrel flats and action's watertable (flat areas where the barrels and action / receiver meet. Make sure others can read the writings and codes marked on both.
3. Anywhere the wood meets the metal
4. Butt plate
5. Barrel ejectors or extractors
6. Overall photos of the barrels, receiver and stock and forend.
Post your photos is a forum thread that you start and ask for people to help. It is really that simple!
Here's a video of how to post a photo to a forum thread:
http://parkerguns.org/pages/faq/Demo...tureVedio.html
If you need more help just ask!
PS: Thank you for you Naval Service.
Mark