Try an large old fashioned soldering iron on the center of the coin/medallion to heat it up without heating the wood and wood finish to much. Call CS first and see what is used to affix the medallions into the stocks, that should tell you to what temperature you have to heat the coin to soften the adhesive....If needed, drill and tap the medallion, screw in a long bolt to give you leverage, heat the coin and then bend the bolt off to the side to apply leverage and remove the medallion, you will however ruin the issue medallion....unless you just tell people you shot the hole through the center of the medallion at 200 yards with your Handirifle!!!....<><.... :grin:
These are all off the top of my head after a couple of single malts so there may be a better, easier way!!! You know, retirement is not that bad after all!!! Just to darn busy!!!