Is this the same coin from your other shot? Doesn't appear to be. But yea, as Irish said, get rid of the pink. Something is off on this image. Not even close to as good as your other 1943 nickel image. Unless this coin has been cleaned. That's what it looks like. Whatever you did to take the other one is very close. You only needed to turn the brightness down a touch.
I use Adobe Fireworks. Free 30 day trial here: http://www.adobe.com/cfusion/tdrc/index.cfm?product=fireworks However, the options and adjustments I do are available in any photo editing software, including Photoscape. The various adjustment options I may or may not use are: brightness contrast saturation levels (or auto level) One thing I will mention, before I use any adjustments, I crop the image first. This is especially important when using auto levels. Without cropping, the levels will take the backdrop into account and generally give undesired results. Remember too: The point of adjustments is to make the image look like it does in hand, not to make it look better or to deceive.