Wegimont-Jamme 19
AAAndrew's Steel Pen blog seems to identify the shape of this nib as a "Shoulder" nib ... one with a "normal heel then an abrupt, sharp, 90 or near-90-degree transition to create a wider, deeper, straight body to the shoulders." On The Fountain Pen Network, AAAndrew further notes that most bank pens have a vent hole in the shape of a torch, and that the torch hole shape is standard across manufacturers. Therefore it seems reasonable to conclude that this was a bank pen designed with a shoulder construct.
Liège is a city in Belgium. In the past, Liège was one of the most important industrial centers in Europe, particularly in steel-making and the secondary industry--in the manufacture of steel goods. Of course, it is easy to speculate that one such secondary industry could have been the manufacturing of steep pen nibs.
I cannot find a nib manufacturer, reseller or other company named Wegimont-Jamme.
Versions
There are no additional versions of the Wegimont-Jamme 19 Pen in the Chappy's Nibs collection, as pictured below (gray-finish).
Photos
Click any image for a full-resolution photo: 1650 x 480. The image with the ruler is 2300 x 1196.



