Allison wrote about 5.25 inch diskettes with small (35-track) head windows:
I have em. Both 10 sector NS* format (no even for $20
I dont give them
up) and also some of my TI99/4a likely others that I'd have bought around
Wow! What brand of diskettes were they? All the NS diskettes I've seen
have the standard windows, but I think they were just 3M and Verbatim
diskettes.
Cheers,
Eric