Hi, Jedmar. I think this is not Mme Caroline Testout. I compared the photos, blooms show some resemblance, but the habit is completely different. The Briand - Paneuropa rose which I photographed in the Institute of Botany - is a delicate Hybrid Tea, quite small usually 60 cm high. Egg shaped buds open a bit unwillingly, but if they open flat than the bloom may be quite like the one of Amiroses. The colour is silvery pink to pale pink.
By the way, when I searched for more information about this rose I found a different description which collides with description here on HMF and with both photos here. Czech Rosa Klub published a plant list of Böhm´s roses, the Briand-Paneuropa is descibed there as "Hybrid tea - zinober pink with golden reverse". Do you grow this rose? Have you seen it anywhere? Which description is correct? I plan to visit a library and to search for catalogues published in the 30ties by Jan Böhm himself.