I don't know how to insert photographs into a reply concerning the Silvermine Bay topic which seeks answers concerning a gateway containing two Chinese characters.
The structure above the second man from the left is "I think" this one which shows yours truly with David Henderson. We had just finished our 9 months Police Tactical Unit posting and were on a week's leave. The month is June 1972. Notice how the structure sits on multiple columns.
Dave W
Date picture taken
1 Jun 1972