Here for sell just now, a great find, one rare antique LATE 19TH-CENTURY MOUNTAINEERING/BALLOONING ALTIMETER BY Th. Usteri-Reinacher N3726 the laminated brass case with revolving silver drum divided 0-10°, and containing tube thermometer, signed Th. Usteri-Reinacher N3726, the side with vernier with fixed magnifier secured within original black [...]