Unknown plaque [????- ] | Gwulo: Old Hong Kong

Unknown plaque [????- ]

Current condition: 
Ruin

Can't view the other side of it, the back is facing the sidewalk opposite #15A, does it have anything to do with the railway or the ex-RAF property nearby?

 15 何文田山道

https://maps.app.goo.gl/dPbKyBiXSGZ9Kizv6 

It reminds me of the road sign plaque at Sha Lo Tung, Tai Po.

 

Photos that show this place

2022
2022