Thanks Vincent
the large decal on a 5-stripe engine is the “defect/rarity”.
normally the 5-stripe engine has the small decal.
the large decal is normally found on the single stripe engine.
while at a train show a vendor showed me a reference to this “defect/rarity” in one of his train books. I have asked for a copy but have not received it yet.
i have no ides if there are individuals who collect this sort of thing or how to reach them if they do.
the stripes on my engine are nit brilliant. I assume this detracts from the value of the engine.