This is an assembled Victorinox Hiker in Queensland Black Walnut Scale with exposed flushed rivets.
The rivets were peined as normal and then filed flushed against the wood scale. I haven't perfected the technique yet as not all the rivets are the same size.
I applied several coats of Kitchen Timber Oil and let it soak through the wood and then waited for a few days for it to completely dry. I then sanded the top layer it a bit and applied several coats of Carnauba wax for the final finish.