Dysan Digital Diagnostic Diskette 3.5"
Model 305-400 DDD 135 tpi 300 rpm or 600 rpm
This is a Dysan CE Division digital diagnostic 3.5" floppy diskette for testing to see if the diskette drive is with in standards.
You are getting just the Dysan Model 305-400 DDD 135 tpi 300 rpm or 600 rpm diskette NO software.
This pdf file is the paper work for this diskette that you see in the photo.
Dysan Model 305-400
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