What model is this Altec Lansing?

[jbl-ahhh]

See attached pic. Woofer is 12". Anybody know what it is, how old, and how good? Many thanks.

[JBL 4645]

I haven’t the first clue except take a bog roll and place it over the dented dust cap on the LF bass driver and suck on it until it pops out into shape.