Jean_LAMESCH_Sliderules_Collection_BOX_JL05

1666_WICHMANN_431

1666_WICHMANN_431

WICHMANN 431, cheap cardboard German simplex sliderule from ~1910 (possibly 1900). Cursor is called "Nasenläufer" ("chisel" in English). Some blobs and blemishes. Name of owner " Johannis ??? 1920) written with ink on back side.