Case for Wetli planimeter, date about 1860
Case for Wetli planimeter, date about 1860
Wetli planimeter, in case, date about 1860; engraved "Patent Von Wetli & Starke No. 103"
Case for Wetli planimeter, date about 1860
Wetli planimeter, date about 1860; engraved "Patent Von Wetli & Starke No. 103".
Parts of Wetli planimeter including: Brass cylindrical form with smaller cylindrical stud in the centre on one side; Wooden cylindrical spool with a thin grey wire wound around. There is a hole that runs through the spool in the centre; Flat head screwdriver with brown wooden handle and tarnished brass rim. There is a red/rust coloured mark on the handle. The screwdriver head is in a silver metal ...