69CAE. Cornwall Road, Smethwick, Sandwell, West Midlands With thanks to Leo Conway for discovering this Survivor. Located at the junction of Downing Street, and partially obscured by a brick wall, is a length of tubular steel pipe that has been formed to support a top-entry lantern; in this case, the lantern fitted is a British Thomson-Houston (BTH) Urban Enclosed ST907 / SM278 - the exact part code depending on the lamp type employed within the lantern. If this is a 300 - 500 Watt GLS (incandescent) version, the former code is applicable; in the case that a 250 - 400 Watt mercury vapour (MA/V, and later, MB/U) lamp is used, the latter code would be correct.

Historical Google Street View imagery reveals that two wall-mounted Urban Enclosed lanterns used to exist on the building to which this example belongs. By August 2012, both had been removed, and no trace of their existence remains.

The characteristic stepped glass refractor bowl was one of three options that BTH offered for this type of lantern - the other two types being clear (used when an internal refractor was fitted), and opal.

A slotted cheese head screw passes through the bowl retention ring, and threads into the canopy to secure the bowl ordinarily.

A rather narrow steel bar is welded to the column structure to serve as a rudimentary means of supporting a ladder during lantern maintenance.

The wide pipe diameter requires the use of various adaptor couplers to reduce the diameter to the required 1" BSP top-entry thread of the lantern.

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