Procédés Herbay Unknown

Procédés Herbay (later Herbay-Ronette) was a French electronics manufacturer based in Montreuil, Paris. The company began in the early twentieth century producing radio components before moving into piezo crystal microphones after the Second World War. By the late 1950s and early 1960s, Herbay had become closely associated with the Dutch capsule maker Ronette, producting various high-impedance crystal microphones.

Other examples of Herbay microphones can be seen here and here.