make / manufacturer:Leslie Speaker / Hammond Organ
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Leslie Speaker 122 hook up kit
428-13 Tremelo Control Terminal box
Leslie 428 console control terminal box allows the Leslie 122 family of speakers to connect to Hammond organs with the AO-28 preamp (B-3, C-3, A-100 series, D-100 Series, RT-3).
Add a Leslie 122/147 & a fast/slow half-moon speed switch & you are in business.