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Date: |
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Description: | S 6.30 No 8
Card-Mica covered with paper, white with black markings, graduated to 1/4 points. At centre of card is a hole 1" dia. to accommodate pivot.
Needle- Three edge bar needles (fourth missing) 2 x 3.75" and 1 x 2.75" long. Composed of laminated steel. Outer needle 0.25" deep with two laminations, inner needles 0.25" deep at ends having semi-circular swell at centre 1.25" dep, with four lamianations. The needles are 1" apart. Attached to a metal ring 3.25" dia. which is screwed to card.
Pivot-Inverted type (missing), two brass knee pieces for securing gimbal ring to inner needles, are in place.
It is probable from the design of the card that it was made by Barrow and not Grant Preston.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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