Both straps look like Dirk's to me. stitching looks to me to be genuine Dirk from the earlier series which had the Panerai stitching. The strap with the yellow stitching may be a newer Dirk from after he switched the stamping. About the time the PAM000 and 005 came out Dirk was no longer able to use the original Panerai stampings and the buckles. That's when he switched to the Incursore/Seawaterproof/5218 wording. The stamping on the buckle for the strap with yellow stitching is different from the other. I have Dirk straps that have buckles that appear to match with both styles. In particular the PVD buckle I have matches the buckle on your strap with the yellow stitch and **** buckle I have matches the other strap. The strap with matching stitch looks like it was made like a Dirk "deluxe" with the groove in the leather between the stitch and outer edge. The only thing that seems odd to me that you have a strap with the newer wording and the older buckle.