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Details
A good 19th-Century oxidised-brass Lean-pattern circumferentor,
by Negretti & Zambra London, the 6¾-inch telescope with rack and pinion focusing and crosshair adjustment screws, mounted over a bubble level and vernier arm atop a horizontal half-circle and adjusted with rack and pinion, the half circle graduated in two quadrants on one side with a differential scale on the reverse, over the 5 3/8-inch horizontal plate with bubble level and glazed compass with edgebar needle, declination scale and fine-screw adjustment and clamp, raised on a staff or tripod mounting, with twin alidades for use in place of the telescope, in a fitted mahogany carrying case -- 25.7cm. (10 1/8in.) wide
See Illustration
by Negretti & Zambra London, the 6¾-inch telescope with rack and pinion focusing and crosshair adjustment screws, mounted over a bubble level and vernier arm atop a horizontal half-circle and adjusted with rack and pinion, the half circle graduated in two quadrants on one side with a differential scale on the reverse, over the 5 3/8-inch horizontal plate with bubble level and glazed compass with edgebar needle, declination scale and fine-screw adjustment and clamp, raised on a staff or tripod mounting, with twin alidades for use in place of the telescope, in a fitted mahogany carrying case -- 25.7cm. (10 1/8in.) wide
See Illustration
Special notice
No VAT will be charged on the hammer price, but VAT at 17.5% will be added to the buyer's premium which is invoiced on a VAT inclusive basis
This lot is subject to Collection and Storage charges