Help identify my mystery wall tile!

[annnajoy]

I've had no luck identifying this wall tile with online reverse image searches and would be more than grateful if someone can help me identify it here!
My apartment building is over 100 years old, and this wall tile was probably installed 50+ years ago. Maintenance is no help so I'm taking action into my own hands.
The tile is 6"x8"

 

[Ben-gee]

Do you seriously think they will still be for sale????

 

[annnajoy]

Do you seriously think they will still be for sale????

Do you seriously think that was an appropriate response? I'm just trying to find the closest match

 

[Ben-gee]

Or trying to get someone else to do it for you, more accurately.

 

[Dongles]

Are they bathroom tiles by any chance? It was traditional years ago to store any left over tiles under the bath, behind the bath panel. Good luck.