Sweet’s indexed catalogue of building construction for the year 1906 (1906)
New York : Chicago : Architectural Record · leaf 743
w Design No. 5 MECHANICAL INDICATING DISC Design No. 13 MECHANICAL INDICATING DISC Design No. 14 MECHANICAL INDICATING DISC Design No. 19 MECHANICAL INDICATING DISC Design S SIGNAL FI.XTURE IN CAR FOR HOTEL ELEVATOR The Signal Lamps for waiting passengers are set in ornamental iron lanterns…
Building materials
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