Demainbray's turquoise disc
1745-1755
Demainbray's yellow disc
1745-1755
Green glass disc, 1725-1750.
1725-1750
Pair of coloured glass discs, 1750.
1745-1755
Wood screw from green glass disc, 1725-1750.
1725-1750
Disc, metal, obverse covered with concentric grooved circles
Disc, metal, obverse covered with concentric grooved circles
Ten blackwood and ivory discs
1843-1884
Pair of Marble Adhesion Discs, with Band and Ring Handle
Discs for Leipzig wheel
Disc to block out one side of trial frames
Eight ivory discs inlaid
1843-1884
Ivory Discs for Optical Model
Four ivory stage discs
Pewter discs for making bases of tankards or small dishes
1996
Two copper covered discs, one zinc disc
1780
Disc, on side arm, reflector?
Ten pairs of discs for Symphonion twin-disc musical box
Fifty pairs of discs for Symphonion twin-disc musical box
Green glass disc, 1725-1750.
1725-1750