FA Designing Model train Signalling semaphore signal

Constructing & Operating Semaphore Signals by Mick Nicholson ,VGC , large format 65 pages.
Really detailed book on designing and making semaphore signalling
systems for the railway modellor.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item70185753956&ssPageName=STRK:MESE:IT
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