Removed the grey coating and remnant parts of the metalisation/ MO sum to
about 1.5 ohm. The joining section is about 1 x 1 mm with a neat hair-line
crack across it and no sign of any heating there.
So mechanical breakage, I will dig out my microscope and take a photo of it.

Before removing coating, was definitely 2.2 ohm markings with white band
(if) for x16 presumably referring to that 1 x 1 mm section, so x32 violet
banded one would have a something like 0.7 x 0.7mm intercept region and a
green band x8 would have more like 1.4 x 1.4 mm fusing area.

Anyone care to give a reason for shock induced fracture just at that point?

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/