I have an old Kustom 4x12. It's ported, made of MDF (?), and devoid of any helpful markings to tell me what model it is. From what I've gathered it's from the mid-70s. and is either a Lead III or Lead IV. It looks like this:
The speakers in it are unlabeled. I've read that these cabs came from the factory with either Eminence or SRO speakers, but its such an old cab that they could very well have been swapped at some point. The magnets of the speakers (which are round, not square) in my cab are stamped:
513-105782
8-16 ohms
29563
8858014
Do any of those numbers mean anything to you folks? I'd love some more info on what these mystery speakers are if anybody can help! Also, if anybody has any idea what model in particular this cab is, or how to tell the difference between a Lead III and IV I'd appreciate it. Thanks!