Today I received a response from Smith&Wesson or Thompson Center Product official site:
Reference number: LTK1114701571715X
Dear Jaroslav,
We would like to thank you for your e-mail and contacting Smith & Wesson / Thompson Center.
I haven't seen one of these before nor do I have any info on it here.
For further information on the history of your medallion visit the Smith and Wesson Historical Foundation. Please see the link below:
http://www.swhistoricalfoundation.com/info.htm
Smith&Wesson values its customers and we are happy to have served you today. Please do not hesitate to contact us should you require further assistance.
Regards, Steve