Bass Chromatic (Seydel)

This is a very unique and interesting instrument. It has a range of one octave. The notes are not sorted in chromatic order.  The slider serves to move to the next adjacent note which is usually a half step higher (the exception is the last channel A->E) .
It was most likely manufactured by Seydel. Unfortunately, the harmonica came without a box and there is no manufacturer name anywhere on the covers. One thing that points me to Seydel is the slide button. Comparing it to a Seydel/Bandmaster chromatic harmonica button it looks identical. Jugging by the lettering on the covers, my best guess it that it was produced in the late 1930s.

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Bass harmonica with slider, from my collection. Most likely produced by Seydel in the late 1930s
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Seydel Bandmaster and Bass chromatic. The slide buttons are identical

Each channel consists of two blow reeds. This is a contrast to a “regular” chromatic harmonica which comes with blow and draw notes .
Each channel contains two reeds, tuned exactly one octave apart. This concept is similar to a standard Bass harmonica which also comes with two blow notes (one octave apart) per channel .

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There are two reeds per channel. One tuned one octave apart
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The bass harmonica completely de-assembled

A similar concept was picked up years later by Suzuki when they came out with their own S-48B Bass Chromatic.

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