Campbells Improved Concertina

[stevetwilliams]

I've just received a v. battered Anglo concertina badged ' Campbells Improved Concertina' 103 Trongate, Glasgow.  The box has wooden lever arms linked to 4 Accordion style reed blocks in each end.  The central blocks can be shifted from the outside, effectively supplying two voices or possibly doubling the number of notes.  I suspect that the box is too far gone to be economically repaired but I am curious to know more.  Can anyone direct me to any further info ?   

[John, Wexford]

Here's some information.

 

 

[Takayuki YAGI]

A similar one was discussed before:

https://www.concertina.net/forums/index.php?/topic/17785-german-20-key-with-switchable-second-voice/