If you can't find any information, what I would do is apply power and check for any odd voltages on the card-edge connector, just to be 100% sure there is nothing seriously weird with it that could cause damage.
Then attach it to an FDC and use ImageDisk to manually control it. Use alignment mode to manually step to the 40th tack. If it only seeks half way, then it is an 80 track drive. Check the RPM value, and if it spins at 360RPM then it is probably a 1.2mb drive. If it is 300RPM and has only 40 tracks, then it is probably a 360k drive. 300RPM and 80 tracks, then probably a quad density drive.
From there, try reading disks and formatting disks.
Keep in mind that if this drive was not designed for use in an IBM PC, there can be a number of differences. For example, it could flip between 300 and 360RPM depending on density. If HD, density select line could be reversed. It might support high density only operation. It might not have the same "ready" signal. (In other words, if it does not work it might not be broken.)