Portative organ - Bourdon 8' in wood - Principal 8’ in tin - Flûte principalisante 4’ in wood - Dessus de Quinte 2’ ⅔ in tin - Doublette 2' in tin or - Régale 8’ in tin The case is made of polychrome poplar wood. This work was done by Antoine Fontaine. The keys of the keyboard are made of spruce wood. The natural keys are veneered with ebony, the sharps are made of bone. A small decoration has been made on the pediments of the keys.

Premier clavier - Principal 8’ in tin – 1st octave from Bourdon 8' - Prestant 4’ in tin - Quinte 3’ in tin - Basson 8’ C - c’ in tin à 415 Hz Deuxième clavier - Bourdon 8’ in lead– 1st octave in wood - Flûte à cheminée 4’ in tiin - Doublette 2’ in tin - Régale 16’ or 8’ in tin - Coupler II/I - Tirasse I or II The two 53-note manuals (CD-f'''), whose naturals are veneered with amourette wood and the feints in boxwood, can be transposed into 392, 415, 440, 465 Hz tuning forks. The 29-note pedalboard can be transposed to 392 and 415 Hz. Source The instrument is made on the basis of an organ that we restored for the Musée des Arts Décoratifs of the City of Strasbourg. This historic organ, built by André Silbermann in 1719, was installed in 1730 at the convent of Saint-Joseph (Tierceline Sisters) in the town of Haguenau (67), by Jean-André Silbermann. The project, based on the concerts presented at the Palace of Versailles, consists of placing the Grand Orgue at the centre of the orchestra. Indeed, the small positives called "chests", usually used, have nothing historical about them, at least not for large-scale music or religious music. They are, most of the time, dedicated to salon music in the eighteenth and even at the end of the seventeenth century. The organ was built to have a very dynamic instrument, with a rich palette of colors, by applying three sound planes, one of which is drawn. There are many testimonies about the fact that you can vary the continuo from the smallest Bourdon to the large 16 foot reed with the pedal. We have therefore designed and built an organ on the basis of a large positive that allows, despite everything, to be moved and tuned according to temperature variations and in the different temperaments required by the musicians. It is obvious that it will take some time before this instrument is tamed by concert performers who will have to adapt their habits and probably look for different ways of using registers in historical texts according to the moments and the musical numbers. Various devices have been provided to facilitate the tuning of the pipes, including the fact that the regal's shavers come out of the box that surrounds it, so that it can be tuned even if it is closed. This instrument - dedicated to the continuo, with its couplings and pedalboard, thus becoming much richer, in particular with the bassoon bass (made after a Silbermann model measured in the nineteenth century) or with the presence of a 16' - is nevertheless a concertante instrument, even allowing to approach the organ repertoire.