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Signal Training Volume III. Pamphlet No. 2. Heliograph, 5-inch, Mark V. 1922.
Orig. buff printed wraps., 19pp., several diagrams. Printed by Harrison & Sons for HMSO.
1922
#67947
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![[HLMainPic]](booksThumbs/67947.jpg "Click on the left or right of the image for more images")
Containing descriptions of the Instrument, & instructions for working, with supporting diagrams. VG ex-RUSI. See illustration on our website.
£30
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