I've just got a draw towards RFA/RGA. Chronologically, I don't know one end of WW1 from the other. It wasn't until a year or so ago that I discovered that my granddad was in the RFA (no service record of course).
We may be getting somewhere. It's a British postcard by the looks of it and to your architectural knowledge, being better than mine, could it be Scotland?
I have a feeling that it is 33rd Reserve Battery, which appears to be part of 6C Reserve Brigade. The documentation/ references for the home based reserve brigades is extremely thin on the ground. One reference to 6C Res. Bde, however, places them at Redford Barracks, Edinburgh. The Battery was certainly in existence throughout 1916.
Phil