Next thing we need is some screws. It is very easy to create one: create new grey circle...
...then apply again the same layer effects to it (except pattern overlay)...
and then add another grey rectangle and set its blend mode to Multiply.
Then group these two layers (select them and hit Ctrl-G). And then: duplicate - move - rotate - repeat!
Next thing we need is some small jewels. Create new circle shape, apple the following layer effects to it: Bevel and Emboss (mode=down, highlight and shadow=overlay), Inner Glow (black, mode=overlay). I had a photo of glass sphere in stock, so I pasted it into this file, scaled down, de-saturated (Ctrl-Shift-U) and adjusted levels (Ctrl-L) to add contrast.
Center-align these 2 layers, and group glass layer with previous (Layer menu - Create Clipping Mask). Then set second layer mode to Overlay.
Almost done! Now we just need to add some mysterious look to entire wallpaper.
Make a copy of PSD file, then merge all layers (Ctrl-Shift-E), so that al layers are united into one layer. Then duplicate this layer and apply Gaussian Blur (Effects menu - Blur), with raduis = 5-10px.
The very last touch is to add some lights reflecting from the clocks. To make it, change foreground color to white, then switch to Polygon tool (U), set Sides = 4, then open dropdown window with Polygon Options, check Star checkbox, set Indent to 92%.
These settings will allow you to create this shape.
Then simply set layer blend mode to Overlay, and add some very subtle Outer Glow.