Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc. / Kolesch & Company. (1917)
Kolesch & Company · Kolesch & Company · leaf 209
.. Trivet for Levels Nos. 7850-7890 Vertical Circle, with 2 opposite Verniers and Guard, in place of regular Vertical Circle Vertical Circle and 1 Vernier, graduated on outside edge instead of flat face, with guard in place of regular vertical circle.... $… … 7500 Metropolitan Transit. (For description see Page 207.)
Drawing instruments · Surveying -- Instruments
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