I have put the scans on imgur once and it said they were too big so I resized them all to 800px wide but now I am getting this error if I try to put images tags around more than one:
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It was not possible to determine the dimensions of the image. Please verify that the URL you entered is correct.
Well, what shall I say. Theese holes are more or less home made! You can see that some of them are not exactly in the right position, some are marked with a pencil, and some of the floppies are labeld as single sided. So the additional holes are not made by the factory. Also the second write protection holes are cutted with a sissor or something similar...
Nevertheless I wondered what technique was used to punch the holes without harming the disk itself!
I only know of two such systems still in existence.
Note that the product label for disk 047 (obscured by the handwritten label) says it is double-sided so this appears to be a commercially manufactured double-sided hard sector disk for use in a double-sided drive.
(That doesn't necessarily mean the second index hole wasn't added by hand though - perhaps just certified for DS).
In the image above of the observe of 047 you can see however that the user has still had to hand-notch so they can flip it over for use in their single-sided drive.
One of the jackets was too distorted to get between the heads so I had to open up two of the disc's jackets and swap the biscuits over providing a glimpse of the holes.
There is some compelling software on these hard sector discs for the Sorcerer that to the best of my knowledge not been migrated before and which it would not otherwise have been possible to preserve without access to a working vintage system.