OR is an exact reproduction of a period item. Evaluate the work as a whole. Most period instruments were variations on horn or trumpet. Many variations affected only appearance. These may be documented with period illustrations and construction details documented from standard pieces.
Slide trombones are period.
Rank the ambition of the attempt, NOT the workmanship, on a scale of 1 to 5 based on the following. Most period instruments were variations on horn or trumpet. Many variations affected only appearance. These may be documented with period illustrations and construction details documented from standard pieces. Explains original research or experiment.