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 40
176. Proportional Dividers, divided for lines and circles, with micrometer adjustment, 9 inch lb 50 yilllMHIM … 177. Bow Pen, with spring and adjusting screw 17#. «. « and pencil point.. Cases for Nos. 178 to 17C> ...Jl 00 and I i FINEST SWISS INSTRUMENTS.
Drawing instruments
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