Charles Bizey was registered in Paris as a woodwind maker between 1716 and 1752. He was a famous maker in his time and he produced high quality high-and late-baroque woodwinds, often in low French opera pitch (ca. 392Hz for a).
One of his still existing instruments (Miller collection, Washington) is a very fine alto recorder in this low pitch. It is in fact one of very few left recorders in so low pitch. Added to this, it is also a very beautiful instrument with a very full sound (especially in the low and middle register) which makes it very suitable for especially French baroque music but also for some of the early Bach cantatas.