Zenith h880r speaker info?

[mibag6]

Just wondering if someone can tell me what sort of speaker is used in this old Zenitth console I'm working on? I was hoping to be able to test this without pulling the speaker from the cabinet but I can't find impedance info. I basically want to know if I can use an 8ohm speaker or if this unit requires the speaker it was connected too? Parts list just calls it a 10 inch speaker. H880R/8h20
Thanks