Skand Elektro Relays 6NO Vintage 24VDC Lot of 7

New Old Stock Surplus Item from Spare Parts Storage.
Lot of 7.
These were tested with our bench power supply and seemed to work best at 24VDC. While they would close as low as 15VDC, the response at 24VDC was noticeably better.
We have no documentation for the voltage & amperage these can switch. The hole for soldering is about 1.5mm in diameter. Each strip is 3.14mm wide and 0.45mm thick. They appear to be nickel.