I haven't been able to confirm the operation. One makes a rattling, bad-sounding noise, and the other sounds okay, but it's unclear if it's working correctly. Both seem to have a relatively simple structure, so I'm looking for someone who can repair or maintain them. I also had another hand-crank generator (image 4) listed, but it's sold out. #GarnetTradingCo_Science #GarnetTradingCo_ShowaRetro #GarnetTradingCo_Children 4444→4000