Good choice! I love the 19 WOC, so versatile and the top handle is a game changer. Mine is in goatskin, sorry I cannot be much help with lambskin. It's from the 20A collection. I've had it for a year and a half. Wear it quite regularly and I do not baby it. No issues with color transfer while wearing jeans or dark clothing.
*Just took these pictures for you, current condition. I have worn it easily more than 50 times. Packed it on multiple vacations, thrown it in totes, and split coffee on it once