Mr. Schuknecht gives the GM was the inventor of the Beast - >>Clamshell / Muschel-Verschluss / Stabil-Verschluss Action <<(If I read it correctly)?


>>The next to last guns shown in the photo gallery in our archive is a double rifle made by the Heym Company in Suhl.The guns with the “Clamshell Action” (Muschel Verschluss or Stabil Verschluss) could have been made by several makers, among them Robert Schüler (RS) in Suhl, the inventor, Gebrüder Merkel (GM) in Suhl, Oskar Merkel in Suhl (Merco) and Bernhard Merkel in Suhl (Bemesu). All were of best quality and some had the maker’s mark that is shown above after their name on the underside of the barrels.Foerster guns are now very desirable to gun collectors and bring very high prices when sold by good auctioneers like Julia in Maine.<<

http://www.germanhuntingguns.com/about-the-makers/gun-makers-dealers-f-j/
scroll down to Foerster.....

Cheers,

Raimey
rse