Been busy overhauling the brake calipers on my Stalwart. The caliper is a 4 pot iron affair of 2 halves.
Well 5 of mine are ,the sixth has an alloy half and chromed pistons.
The pistons seem home made and while the bearing face is very good the underside is quite rough.
The alloy casting seems identical to the steel half on the other calipers ,anybody know where it comes from?