Mystery Hong Kong Pennant

I'm trying to identify this interesting naval (?) pennant and would welcome any comments.

It measures approximately 52 cms x 24 cms and I think its use was probably ceremonial rather than functional given the quality of the workmanship.  

It has been suggested it might have some link to the Lady Maurine - the launch used by former Governors of Hong Kong..?

Thank you in advance for any thoughts on this. 

Date picture taken
unknown