Cool coinage jh, could you describe how you created then in a little more detail?
Ok, to appease the Scrooge-GMs, I made some brass bits (copper/zinc). Here's the process for all of them: 1) get some zinc round flat circles. They typically have faces or symbols on them by some country that isn't The Holy Sigmarite Empire. They can be gotten out from under couch seats and lint-filled pockets in most countries and seem to be mixed in with other metal flat circles that actually have value.
2) smash them to oblivion on an anvil with a hammer. Use a brick hammer or the claw portion of the hammer to put grooves in them. I don't have an anvil so I pound them on the sledge (as my anvil). If you want to spend a lot of money you can purchase a "Penny Smasher." It takes about 15 hits per coin and you will wreck your muscles and tendons unless you are a blacksmith or take your time.
3) Paint them silver or gold. If you're starting with copper-colored zinc to begin with, I just dirty them up. At the bottom you can see that I used "chrome" paint (cost me $3.99 u.s. at Ace hardware..and doubles for my overnight forays into the city to paint "For the Empire!!!" on dumpsters everwhere
For the silver-painted ones, I dirty them up with a black-paint rinse. The gold ones, I leave clean.
The "brass/copper" coins should be dirtied up as remember the tier that uses them. I mixed green, brown and black paint into the grooves and mark them with a 5 (there's no point in having any other value on a brass because of conversion and the fact that nothing costs a variable amount (slings and clothes should simply be changed to 5b and 15b accordingly).
I also stuck the hint of green paint on them for two other reasons: 1) NURGLE/dirty/disease…I mean, I made the coins below look absolutely filthy and disgusting, even putting some "blood red" onto a few of them 2) they give it a copper-like patina. Sorry, I couldn't get a better close up, but take my word for it, you wouldn't want to throw the barkeep one of these and then have a pie with their content still on your hands.
For the 5 value golds, I smashed up some non-Sigmarite Empire quarters and painted them silver. My artwork on them is crap, but it's passable for their purpose. I thought about making a woodcut ink-stamp, but ..that might go a little far.
Here are some pictures of the new brass/copper coins mixed in with the silver and gold for contrast. Like I said, denominations of 5 for these works best to keep the count down. Silvers are in the form of 1's and 10's. Gold I did in 1's and 5's (who's ever going to get a 5..laugh!)