My very first big purchase after Air Force training camp was this $300 Bulova watch. After 12 years of service, I now give it a resting place on my desk. (It got water in it and some pieces rusted)
Step 1: Lay Out Each Part.
This was the most time consuming part. Dismantling the watch was easy, choosing the layout took me about an hour. I ended up not using the wristband links. I used Henkel Super Glue Gel Control to glue the pieces on card stock colored smooth finish. I started using tweezers, but for some pieces because they're magnetic, I had to use a tooth pick.
Step 2: Picking the Frame.
You have to choose a frame that has some depth to it. Luckily I found one just the right size. The glass is actually right up against the largest/thickest part, which is the housing.
I also used chalkboard spay paint to give it a dark background.