Hi!
When wood gets older like this, the edges then to get worn out and rounded a lot and they also get a lot more irregular. I see you already did some beveling on your parts, I would probably use the sculpt tools to wear out those bevels a bit and make them more slopy and irregular.
Also the texture plays a big part of it, having good textures with normal maps that show deep veins in the wood and wear and tear around the edges.
Things like this need a lot of trial and error to get right.
I hope it helps!
