The original flute is made of boxwood, which has been stained and treated with violin varnish. It has seven middle joints and is equipped with a screw-cork and foot register, which can be pulled out to fit the middle joints. The flute plays very well with middle joint No. 5 at a=415 Hz, making it possible to reproduce the original without any alterations. Its round embouchure and very balanced character make the Rottenburgh a universally employable flute that can span the complete range of Baroque flute music in a very sensitive style. I construct the Rottenburgh in well-aged Cocobolo, with a foot register. The surface is finished with oil, enhancing the quality of sound. The pitch is a=415 Hz. This model can be made from Ebony or granadilla, or boxwood as well. This Cocobolo flute is over 50-60 years aged. The Cocobolo in the market today is planted with growth catalysts thus is far from the high density and premium-quality natural-grown Cocobolo I use. This model can be made from Ebony or granadilla, or boxwood as well.