Hong Kong Defense Reserve 1939 | Gwulo: Old Hong Kong

Hong Kong Defense Reserve 1939

I have a 1939 Hong Kong Volunteer Defense Corps (Signals) Christmas card group photograph, sent by my uncle Leslie Warren to his family in England. At 39 he didn't fit into the older age group mentioned above, and I suppose the Reserve is a different group of people. I could try to scan the photo and post it, although the quality isn't very good. Is there a different list for the Corps?

Jill

PS Their motto printed on the front of the card is 'NULLI SECUNDUS IN ORIENTE'