A=16,90 mm; B=11,00 mm; C=6,50 mm; D=3,70 mm, sterling hopea (AG-925)
A=18,00 mm; B=15,20 mm; C=2,80 mm; D=22,40 mm; E=3,10 mm, sterling hopea (AG-925)
a=19,00 mm; plate diameter b=16,50 mm, sterling hopea (AG-925)