The oberlander do not wash before Kiddush. As far as a bracha on tefilin on chol hamoed, I believe that most do make a bracha, but I’ve found some that don’t. Also on the first day of chol hamoed Pesach they keep the tefilin on til after leining (not til Hallel) because the parsha of tefilin is read on that day.
By the way, my nephew found an oberlander shul in Yerushalayim where although they duchan every weekday, they don’t duchan on Shabbos!
The old Viener shul in Boro Park (as opposed to the new Avreichim Viener shul) and the Viener in Monsey, still daven ashkenaz and keep the minhagim. Also the Debretzin shul on 16th Ave in Boro Park follows the oberlander minhagim, although their membership has severely diminished over the last few years. I am from out of town and our shul there, because most of the influential members were oberlander, pretty much follow all oberlander minhagim.
I assume the previous poster made reference to Yeshiva Ch’san Sofer in Boro Park, lead by the Matersdorfer Rav and established in the US by his father zt”l. They are grandchildren of the Ch’san Sofer and Ch’sam Sofer. The Ch’san Sofer, his son and his grandson (the previous Rav zt”l) were the rabbonim in Matersdorf until WW2. Their family also established Kiryas Matersdorf in Israel. Matersdorf was definitely in oberland and was considered one of the Sheva Kehillos. However, because of the early years when the previous Rav first arrived in the USA and he was hired as rav by several kehilos on the lower east side that davened sfard, the yeshiva davens sfard, although many of the minhagim are oberland. By the way Pressburg, Nitra, Matersdorf, Debretzin, Papa, Tzeilim, Beregsaz, Serdahel, Galante are some of the oberlander cities that I can think of now.