see page 181 and further on page 182 here for information on Erwin Pfohl. If I have read that correctly he only stayed at Josephinenhutte (Szklarska Poręba) for one year 1929.
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://www.muzeumkarkonoskie.pl/wp-content/uploads/2022/03/Dr-S.-Zelasko-SZLAK-SZKLA-.pdf
Source:Stefania Żelasko SZLAK SZKŁA NA POLSKO-CZESKIM POGRANICZU, SKLÁŘSKÁ STEZKA NA POLSKO-ČESKÉM PŘÍHRANIČÍ, THE GLASS TRAIL ON THE POLISH-CZECH BORDERLAND
'
His younger brother Erwin Pfohl (1906-1976) took his place at Josephine. He was particularly talented and after graduating from the glass school in Bor he studied in Vienna and Paris. He stayed in Szklarska Poręba only for a year for the climate was too severe for him. He designed very modern, colorful projects which were launched at the end of the twenties of the 20th century. He introduced new techniques of decorating glass. He worked for Reich company in Berlin since 1930. In 1932 and 1934 he made artistic journeys to Paris.
Erwin designed for the Rachmann Brothers Company ....'Obviously this doesn't preclude Josephinenhutte continuing to make the designs after he left however it could indicate they were only made for a short period of a year. Which may explain why there are so few around.
Two have been found which match those in the two photographs (the vase in the Miller's book and the vase Steven first linked to on eBay):
see here ebay vase - 13cm high and 14,3cm wide.
https://www.ebay.co.uk/itm/256910089263?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Odl6IYYdRb-&sssrc=4429486&ssuid=TnRYvsRcQx6&stype=1&var=&widget_ver=artemis&media=WHATS_APPand
The Miller vase is 33cm high:
https://m.media-amazon.com/images/I/91UuFyCAYSL._SL1500_.jpgZelasko book photograph showing various sizes:
https://i.ebayimg.com/images/g/cqwAAOSwp95oD5et/s-l1600.webpFor comparison my vase is 35cm high and 19cm wide at widest point.
Two found are from the range (mine and I believe also the rolled rim marked 'Schneider' vase) but do not appear in the photographs.
There are 13 other designs that appear in the two photographs of the 'flame' versions or those with melted flakes in (two vases the same colourway/shape appear in both photographs so I've counted those as repeats).
It perhaps moves the photograph of Vineta-Kristall by Dr Arthur Traube to 1929 from the given date of c.1925.