No Image Lot 114 Martens Ball-Jointed Metallographic Preparation Microscope, 114Martens Ball-Jointed Metallographic Preparation Microscope, Flints Auctions Ltd Martens Ball-Jointed Metallographic Preparation Microscope, German, c.1900, unsigned but attributed to R. Fuess (see scan), with Zeiss Objectives,... Add to watchlist Live