An ebony and brass vernier sextant the cross-number with inset rectangular ivory plaque signed GAIL & ATKIN NEWCASTLE ON TYNE, main arc with inset ivory scale divided 4 - 0 - 139, brass index arm with ivory vernier, four shades to index mirror, horizon glass on adjustable rotating circular base and with three shades, sun inverting telescope (lacking object lens) together with other accessories in fan-shaped fitted mahogany box -- index arm radius 8in. (20cm.)