Gtpulse
Dyna-Tech Fan
Probably around 1890, it could be one of many maybe a bit less refined than some. Did wonder if it’s a reproduction that has been left to gather patina but the chain/chainwheel and hubs etc all look about right. Could still just about be rescued.
https://www.easyliveauction.com/cat...card-trading-card-and-collectors-sal-lot-919/
https://www.easyliveauction.com/cat...card-trading-card-and-collectors-sal-lot-919/