Weekend quiz: This device was used in data storage. What is it?

Dad, geek, conversation liquidity provider. vrypan.net (home), /weatherxm (work), @l--o--l (fun). Also https://paragraph.xyz/@purplesubmarine

"Data storage" is digital data storage for this context.

Yes, sir! It's a printing cylinder for IBM punch cards!
I bought it 10 years ago on eBay but it doesn't seem there are any sold nowadays.

Engineer @ Syndicate, prev: Rainbow, Foundation & Cloudflare /poetic-web, builds caststorage.com

Yes, sir! It's a printing cylinder for IBM punch cards!
I bought it 10 years ago on eBay but it doesn't seem there are any sold nowadays.

https://americanhistory.si.edu/collections/nmah_690191

Accelerating the shift of money from online to onchain - https://obvious.money 

This dates me. My best guess is this has got something to do with punchcards?

too young to have used this stuff, but heard the stories from my uni professor! Damn I would have been frightened as hell to attempt to write software at the time, any mistake would be literally costly af,  both in resources and time 😅

Is this non-volatile storage?

Aka a super old hard drive