Catalogue. A.H. Abbott & co., manufacturers and importers of mathematical and surveying instruments and drawing materials of every description .. (1896)
Abbott, A. H., & co., Chicago. [from old catalog] · [Chicago] · leaf 140
TRANSITS. … No. Bach 988. Engineers Transit, like No. 987, with level to telescope,graduated on the glass, clamp and tangent screws withcounterspring, needle 5 inch, horizontal limb 6 in.Instrument complete, with plumb bob, in tine polishedmahogany box, with tripod |906 00 134
Drawing instruments
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