circa 1850, approximately 114 drawing arcs, each of finely sawn best mahogany, hand-written ink curve ratio measurement in script, most bearing the I.K.B 18 DUKE STREET - WESTMINSTER stamp also in black ink to centre-top, edges showing signs of repeated use, some with period strenghening cards pasted to the ends, within period associated light mahogany case with interior fittings removed - the longest curve 22in. (56cm) long, the shortest 4.1/2in. (11.5cm), the case width 25in. (64cm)
circa 1850, approximately 114 drawing arcs, each of finely sawn best mahogany, hand-written ink curve ratio measurement in script, most bearing the I.K.B 18 DUKE STREET - WESTMINSTER stamp also in black ink to centre-top, edges showing signs of repeated use, some with period strenghening cards pasted to the ends, within period associated light mahogany case with interior fittings removed - the longest curve 22in. (56cm) long, the shortest 4.1/2in. (11.5cm), the case width 25in. (64cm)
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