Originally Posted by Jtplumb
Germanhuntingguns.com has an early kettner Catalog under archives where you may find your gun, I did.

http://www.germanhuntingguns.com/about-the-makers/gun-makers-catalogs/franz-kettner
I looked at all the guns, mine has the action release under the forearm and it’s made of Buffalo Horn as is the long trigger guard. Thanks for posting that. My German is very rusty however.