use for middle pedal on old upright

[Gene Nelson]

Have a client with a Shoninger upright #7048 dated 1885 in excellent condition. Lots of quality work done to it over the years.
It was a gift to a church - they wanted me to fix the middle pedal as they say it did nothing when depressed.
On closer inspection I found that the middle pedal when engaged, coupled the action to an additional smaller action mounted under the key bed that spans two 1/2 octaves up from G5.
This smaller action when engaged is syncronized with the key causing a wooden hammer like part to strike a small bell, simultaneous with the felt hammer on string. The bells are very closely tuned to the wire when at pitch and give a very unique sound - not rinky tink, more like a nicely made chime or cymbal.
They were amazed at the little treasure that was discovered behind the bottom board and out of sight.
I have never seen this and am curious if anyone has.
Any information would be appreciated.
Gene Nelson
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