Please miss me with any kind of misinformation. I bought an antique at an auction that was once an engineering tool at a university. It's big, is bad and it's German!!! I believe it's all there. I can't find any info on web anywhere. Have not searched dark web cuz I've never been there. At any rate i would love some input on this topic. Thanks for taking the rooms to read this! Respectfully mmcclite