From
http://www.volpriehausen.com/KBergbauRundgang.htmlThe firm existed from 1950-1987. On the website it is variously named as Glashütte Ernst Buder, Bleikristallglashütte Buder.
Ernst Buder, was a refugee from the Lower Lausitz - Eastern Germany/Polish border region. So it is likely that any previous glass work of Buder was in that region... but cannot find anything with the name.
from elsewhere:
Kristallglaswerk Buder GmbH & Co KG, Address: Postfach 2110 D - 3418 Uslar 2 Germany , Products: Machine-made crystal
This form of the name also appears on a 1982/3 tableware catalogue in Rakow library. Products included are Glassware includes pitchers, trays, footed bowls, covered dishes, vases, candlesticks, decanter sets, tumblers, ice buckets, novelty ash trays, animal figurines, and barware.
US outlet c1983 was Action Industries, Cheswick, PA, USA.
Anything you can add to this would be of great interest to us here.