Off-hand, I'd say it is a RoTLA styled jacket in "authentic lamb"....but I need further clarification. Can you open the jacket and tell me if it has any inside leather facings? If the jacket doesn't, then it is a RoTLA off the rack. It is either lamb or goat, my guess would be lamb, though it is difficult to see the grain. There is a distinct difference in the smell of lamb and goat hide, it just depends.
Two variations here....the Standard jacket is cut slightly fuller around the torso and sleeves, has inside leather facings, a leather faced inside pocket and a heavy gauge zipper.
The RoTLA pattern features slimmer torso and sleeves, a nickel or silver color, smaller gague zip, and no inside leather facings, usually two leather piped pockets.
My best guess is that it is one or the other, Standard or RoTLA in lamb, possibly goat. Though from the photos, it appears that the zip is silver, which leads me to the notion that the jacket is a RoTLA style in lamb. Inside photos can sometimes do tricky things, due to flurescent lighting.
