Yes, indeed on the images/pics. I was hoping that Büchseman put it in his collection. My 2nd guess would have been E. Schmidt & Habermann but I'm pretty confident that Suhler Waffenwerke Gebrüder Merkel made it with Adolf Schade in partnership with Ernst Merkel. That oak leaf engraving seems very familiar.

Kind Regards,

Raimey
rse