recent rimfire Walthers have been made by Umarex
Not all rimfires have been made by Umarex. Walther is producing several rimfires, for example the HK licensed 416 and MP5 clones. These are made by Walther, but imported and distributed by Umarex.
The PPK/S .22lr is a nice pistol. I'd buy another. Umarex or not, I'd buy one.