Som Berthiot 38mm
Today is Sunday. I had some time to look at my lenses....
Aguila and Rouah Book, page 132: "according to our knowledge, thre was only one lens designed by this French Maker for the Exakta 24x36 : This is the Olor 38mm f/5,7 with click stops without presetting. This wwide-angle lens, which could be found until 1952, was not of a retrofocus type." I found this item near mint with original box.