James And Holmstrom transposing piano

shiny lever presses down to lower pin, allowing the slotted bar
to move left and right when wheel is turned

This slotted dowel (out of focus, center of picture) is not attached to anything at the top
but attached to the bar in the below photo. Not sure if the dowel is original.

The orange knob is on a hinged wooden bar that is attached to the slotted dowel
in the above photo. It moves the dowel an inch or so, up and down

This is the cast iron wheel, about 6 inches diameter

James And Holmstrom transposing piano

A brass pin is on the "A" key. Keybed is in the A# position in this photo.

First Premium New Orleans Exposition 1886