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Post-horn. Nominal pitch: 4½-ft B♭.

Technical description: Brass. Two coils (five straight close parallel yards); fixed mouthpiece; no tuning facility. Mouthpiece of brass; external diameter 22.8; round rim contour; maximum bite curvature 1.5; cup diameter 15.3; conical cup shape with smoothly blended throat; cup depth c15; bore minimum diameter 4.7.

  • Measurements:348 (including mouthpiece); bell 73.