AN/PVS-21
From Night Vision Wiki
The AN/PVS-21 is a LPNVG(Low Profile Night Vision Goggle) developed by the German company 'Steiner Optics'. It is powered by a single AA Battery.
Tubes
The tubes are proprietary, non inverting and have an unusual PSU placement.
Physical properties
It weights about 729g and therefore is very heavy compared to other modern goggles such as PVS-31A, or even PSQ-42 ENVG.
