ΔE 11.0, fair: the same colour family, but not a straight swap. Polished Silver is noticeably lighter than Leadbelcher.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Polished Silver is noticeably lighter than Leadbelcher.
The same difference applies the other way round: Leadbelcher is noticeably darker.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Leadbelcher on the colour wheel See Polished Silver on the colour wheel
All matches: Leadbelcher equivalents · Polished Silver equivalents