細節
A Russian 3-Bolt divers helmet, circa 1997
constructed in polished copper and brass, the hand beated bonnet with sealed air inlet, non-adjustable exhaust valve, three circular ports (front removable), blanked off valve to left of front port, carrying handle to top, the corselet with weight pins, hook and makers plate; together with a three bolt suit, diving short sword and weighted boots, the helmet -- 18½in. (47cm.)
See illustration (4)
constructed in polished copper and brass, the hand beated bonnet with sealed air inlet, non-adjustable exhaust valve, three circular ports (front removable), blanked off valve to left of front port, carrying handle to top, the corselet with weight pins, hook and makers plate; together with a three bolt suit, diving short sword and weighted boots, the helmet -- 18½in. (47cm.)
See illustration (4)