Letter from Manfred Moersner in October 2004:   Regarding the document for a glazier I attached a scan from an old book printed in 1896, showing different "glas-work". In your letter it simply says "Glaser" which could mean he had to do with the glasses in doors and windows, but could also mean he did such work as the attached grafic shows. (Source: Meyers Lexikon/1896).The museum of Hattingen mentions on their website glass in connection with lamps and watches.  - - - - - - -  Thanks Manfred for supplying this information!