Vintage Embroidered Linen Square

I have a large beautiful collection of gran’s linens. I have kept my absolute favorites that are full of memories and am ready to list the rest. Gran unfortunately passed a while back so I can’t ask any specific details on these linens. She was born in 1920 and lived the majority of her years in Uruguay, Argentina, England and later Canada in case that helps with the era and possible origin of the linens. This one is small 9” squared with scalloped embroidery. I was too nervous to iron for fear of wrecking it. This has been lovingly stored for years and is looking for a home . See pic 5 for subtle mark that was probably from tea (guessing based on the color)