So, look at these below for comparison in this same set -
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only Air Jamaica has silver rims - when you zoom in it's clearly seen.
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the rest do not! Dunno what's up with the factory!
My hunch is - the rest have standard natural metal, and thus these are erroneous / cheaper bulk production engines being slapped on.
The Air Jamaica had to be customised anyways - and so 'okay let's do the silver too for a sharp white outline as well as not too contrast-ey if the rims were black' (I'm assuming the rims are printed / painted on / plated last) .
Maybe
@Phantom
could explain better how these things are done, and also if the black rims are just lazy cost cutting measures
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