looks great, I just made something similar, I traced out a military logo and then stained the wood within the logo (what a nightmare to avoid the stain running with he grain over the lines). For the shells I epoxyed wood screws into .45ACP cases and then screwed them into the wood.
2 reasons, I don't keep Brass smaller .45 from the range, so that's what I had on hand. Also the larger extractor lip on the .45s holds the edge of the coins nicely since I have the coins leaning back on a slight angle.