4.47pm pillbox 315.jpg | Gwulo: Old Hong Kong

4.47pm pillbox 315.jpg

4.47pm pillbox 315.jpg
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I wonder what that conical structure is for.

Date picture taken (may be approximate): 
Tuesday, December 27, 2016
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I still haven't been out to see this one, so thanks for the photos.

Not sure what that conical structure is either. Has anyone seen one like it at any other pillboxes?