The most commonly used ebauches during this period were those manufactured by Ebauches SA (now ETA, SA),[24] namely the Valjoux and Landeron calibres.[25] The 17 jewel Valjoux 84 lever movement with stem wind was the most common Valjoux movement for the Bovet chronographs,[26] but sometimes the 77 calibre was also used.[27] The Landeron movements were more varied, which included the 47, 48, 51, 57, 59, 80, 81 calibres, and for the rare date and moonphase models,[28] the Landeron 186 was used.[29] Most of the Bovet Freres watches contained Valjoux movements, while most of the Favre-Leuba watches contained Landeron movements. It has been said that the Valjoux were the better produced of the ebauches, indeed the best at the time, and that over time the Landeron became more common and cheap in quality, and it is said that the poor quality of the Landeron had a negative impact on the Bovet name.[30] These chronographs were produced in large numbers, and are fairly commonly found on the internet for purchase. This was a commercial divergence in the Bovet identity which is unique in the Bovet history, as it is normally known for refined artistic pieces, and not utility.[31]