This Duolian, number 2845C, is interesting due to the fact
that the coverplate was originally a hook on model, which has been rotated 180 degrees,
and drilled 'between' the clips to be used as a screw on model. This was
made in mid 1931 just as they were changing from the short lived hooks back to screw on coverplates.
We know of a few other Duolians, Triolians and style 0s with this unusual 'recycled' coverplate.
