This seems to be an over elaborate, and hence overly expensive, approach to achieve a magical effect. Three metal bars are shown, all alike but for the fact that one has a tassel attached to its end. The performer mixes up the three bars, asking a spectator to watch carefully and track the bar which has the tassel on it. Regardless of which one the spectator chooses, they are always wrong. The tassel is shown on another bar and everything can be handed out for examination. Complete with instructions.
This trick was shipped in 1933 by Joe Berg of Chicago to Mr H Edwards of Stepney, London. Mr Edwards was related to Lewis Davenport and worked for Davenports. Using names of relatives to buy tricks from other dealers allowed Davenports to obtain examples of tricks which the dealers might otherwise have been reluctant to send to Davenports.