In the video game, you can find and collect the Old Brass Compass starting Chapter 2, after you reach Horseshoe Overlook.
The Old Brass Compass in Red Dead Redemption II; however, requires you to complete a Stranger Mission.
Where to Find the Old Brass Compass
This specific item is a reward for completing Geology for Beginners mission. This means that in order to find it, you need to start the said mission.
So, the first thing you need to do is to locate Francis Sinclair. His house and location can be seen on the map below (Player’s location).
Next, you will have to find all Rock Carvings (check our locations guide here) for Francis Sinclair, then mail all locations to him.
After 24 in-game hours, you will be able to visit Francis Sinclair’s house where Geology for Beginners ends. Here is how his house looks like.
Before leaving the house, make sure you grab the compass from the table. You can’t acquire this item without finishing the corresponding mission, because you can’t enter Francis’ house.
Here is the in-game location of the Old Compass.
How to Use the Brass Compass:
After you find the compass visit a Fence to craft the Raven Claw Talisman. Luckily, for this specific talisman, you only need the RDR2 Old Brass Compass, so, go ahead and craft it immediately.