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Title: Telegraphic block instrument, non-Western Region Tyer's No.1 [Go to resource]
Description: Telegraphic block instrument, non-Western Region Tyer's No.11 train key staff apparatus, unnumbered with 1 key token, Ardgay / Lairg, by Tyer's & Co., London. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: telegraphic block instrument Source: Science Museum Creator: Tyer's & Co. Identifier: 2001-7986 Go to resource More Like this...
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