For this one I've used a stamp by Indigo Blu, some brown (yes, brown!) and green shades of alcohol ink and some embellishments made from a scrap of leftover real copper sheet.
Once the alcohol ink had dried, I rubbed it back a bit with a wet wipe, let it dry out completely then overstamped with black StazOn:
I filled the clock face in with Glossy Accents (not very well as it turned out - I forgot to pop the air bubbles!)
And here are the die cut cogs:
Thanks for looking!