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Altec 420a Feeler

I have 1 lonely Altec 420a biflex. It’s got a low serial number (~1100) so it’s the 15” version. It’s in great shape.

I’m looking to acquire a sister early 420a (15”) but I would consider selling it if I can’t find a suitable match….. so any sellers, buyers or if you know where I might find one please let me know 🙂