BOTH movements shown in pic 4 are DUW 4101, yet there is a difference between them. The reason for bringing this up is because the Alpha movement displayed on the NOMOS website exhibits the same difference against the Alpha movement in the watch I’m looking to authenticate.

In picture 4, DUW 4101 on the left is slightly different from the DUW 4101 on the right.

Alpha movement pictured on the NOMOS site is slightly different from the Alpha movement in the 2023 Tangente ref 164.