'Set Triggers' perhaps from the looks of the small adj screws in them..?
Not unusual on a German or Austrian double rifle but an extra none the less.

Nice rifle. A strip down, clean and check for any needed repairs to metal or wood as necessary to preserve it and make shootable would be the least I'd do.
Preserve from further damage from any rust action.
A new trigger guard of horn to replace the missing original.
Take it out and shoot it.