I'm very interested to see how the large featherlight will show wear and tear, especially on the top handle. I feel like people don't often cover how the handles on the medium and large will crease with use and the most pronounced rippling will be along the major bend points. The classic calfskin is a little sturdier than lambskin, so it can take some use before it starts to show. However, the creasing can be pretty pronounced once it does (showing an example from Google here.)
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Appearance will vary by color, but I wonder if the lambskin will crease faster/show more pronounced creases.