Updated through online information from Michael Hughes.
Status Note: There 1996
SS combination (14 general, 4 ?get?.) 1' Sifflet in the Brustwerk (61 notes) doesn't break; it's 75% tin and cone-tuned. The data in the dedication booklet include mixture compositions and scaling data. The 1' scale at c3 (2 ledger lines above the staff) is 5.9mm diam. x 4/17 mouth width. No scale is given for the top c.