Berger started in 1886, same as C.T. Ham, and appears to have ceased lantern production at about the same time as Ham, 1914, although Berger-made lanterns still appeared in 1915 advertizing by Hibbard-Spencer-Bartlett. The hot blasts are rare and the cold blasts are common if you count the HSB's. At this time, I would date this lantern somewhere in the 1895-1908 range as these are the dates I would assign to the supposed 1889 and 1911 catalogs that are available. My reasoning for this is a whole 'nother story. The whole Berger line needs much more research.