This silver coloured bit is probably made of a nickel alloy (it is not attracted to a magnet, so cannot be steel). It has elongated two part cheek rings. The mouthpiece has two bars on each side and a central rule joint
Dimensions of bit : Mouthpiece 12.5cm (5"), Cheeks 8cm (3") x 5.5cm (2⅛") Weight : 363g (12¾ oz)
