Highly unlikely to be from the same source as I have been buying up sets this last couple of weeks to get a good cab as the ones I have where both either snapped in half or had broken axle spigots.I am putting a set together with a rather nice box I bid on but when it came the contents where not as free from flaws as I expected..I now have a very nice box/Three cabs two with repaired chassis and one with a paint chip on the roof/3 trailers two with the splits and a playworn one.One of the cabs I suspect is a rewheel as the axles seem a bit shiny for its age.All grey wheels by the way....I can also muster a black wheel cab and a trailer with no chassis at all.Maybe that one commited trailerside at some point......
Lets not get the troupes panicking I am sure from the responce on here it must be a coincidence..
I was finally able to check all of mine and do not see any cracks developing on any of my trailers. I find it very unusual. Did you buy them at the same time? Just curious.
One of my examples also has a crack. (Inspection under a powerful magnifying glass clearly shows an opening in the metal rather than a surface blemish.) However, it does not go all the way through to the upper surface in my case.
Looking at my model (an early stencilled version) and at the photographs at the beginning of this thread, I think the cracks approximately follow one of the ridges on the upper surface, and would therefore suggest that they are associated with stresses in the metal during cooling, or just possibly with the riveting process. In the latter case, it could well be a support issue, which would be easy to solve.
If both of Misterpop's examples are stencilled versions (and I can see in the first photograph that one of them is), then I think the cracks are evidence of either a casting or assembly issue, which was quickly identified and rectified by Lesney.