Card- Consists of an aluminium rim and centre boss between which are stretched 32 silk threads. A white paper band 2" wide is attached partly to the rim and partly to the threads. The band has black markings and is graduated to 1/4 points and to 360 degs. It is lsit at intervals to avoid distortion. The aperture between the boss and the paper band is filled in with very thin sheet aluminium.
Pivot- Consists of an aluminium washer to which is attached the silk threads.
Needle- Eight thin needle magnets in two sets of four, are suspended beneath the card by silk threads and sealing wax. Length of needles: 2 x 5.6cm, 2 x 7.0cm, 2 x 8.3cm, 2 x 8.7cm
In wooden box containing 2 caps and 2 pivot stems.