Bowrington Canal Air Raid Pen-Shelters | Gwulo: Old Hong Kong

Bowrington Canal Air Raid Pen-Shelters

Bowrington Canal Air Raid Pen-Shelters
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View the original, larger copy of this image at the UWM website: http://collections.lib.uwm.edu/u?/agsphoto,16563

Date picture taken (may be approximate): 
Monday, September 1, 1941
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Comments

I wonder how this numbering system worked?

The ARP portals were numbered and ran from 1 past 100. I wonder if the Pen Shelters were numbered from 200 on?

Regards, David