604 8k pair 525 BIN

[aeyb701]

When talking of early and late 604-8K's how do you tell looking at them, or can you?
I know there have been threads on it here before: EV ownership, maybe magnet substitutions, OKC versus California versus wherever, for example. Is there serial number evidence? Mine are in the low 1100's.
Jon Archibald
Canada

[Old Guy]

When talking of early and late 604-8K's how do you tell looking at them, or can you?
I know there have been threads on it here before: EV ownership, maybe magnet substitutions, OKC versus California versus wherever, for example. Is there serial number evidence? Mine are in the low 1100's.
Jon Archibald
Canada

Date code more likely. The mag change came after 1985 when Gulton bought them.