Single strand of floss backstitched on a relatively fine 100% linen. Which is why I was able to render letters a mere 1/8" high ...
The quarter serves as a 1" scale.
So, new month, old technique. And in working this patch, I now realize what I was trying to ignore: the July patch posted a couple of days ago is obviously not 100% linen. My mistake, buying a much desired navy blouse at the thrift shop and convincing myself that it was linen (the label had been cut out, but the hand should have given it away.)