E.R.I. | Gwulo: Old Hong Kong

E.R.I.

E.R.I.
Every drain pipe on the building has one of these. Anyone know what ERI Stands for?
Date picture taken (may be approximate): 
Monday, April 20, 2009
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E.R.I. = Edwardus Rex Imperator (Edward, King and Emperor).

E.R.I
Another view of E.R.I.

would have taken many Googs