Shugart 5¼ full height drive (top). There’s a strobe disk to calibrate the motor for 50 or 60 hertz operation.
https://media.hachyderm.io/media_attachments/files/110/828/190/946/285/389/original/d90d30a42fb1a271.jpeg
These drives are chonkers, I also have a NOS one
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