Antique Marconi Bakelite Radio Electrostatic Antenna Scientific Insturment

Description

For your consideration is a Antique Bakelite Scientific Device Coil Helix Radio Telegraph Leyden Transmitter ??. Measures 18" 15". Please view images for further details. Thank you for looking.
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From the collection of Dr. Thomas Peterson of Pepper Pike, Ohio
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Air Ministry Planisphere
Rather ragged plastic wallet a little over 12" square contains a planisphere of similar size with some of the major northern constellations shown and a set of 4 grids for latitudes of 25º north to 65º north which can be placed over it. The device was manufactured for the British Air Ministry which was in existence until the early 1960s so it is of some antiquity. The case has some issues and the celluloid from which the planisphere and the grids have been made show some warping but it is still possible to use as intended.
POSTAGE
Postage within the U.K. £5
Postage to the rest of the world
PAYMENTS
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TRACKING & INSURANCE (optional)
Items are insured up to a value of (£36) in the postage figure quoted. For an in-transit tracking number and full insurance an additional payment of (£6) is required.