As you can see from the image, the seconds hand is a bit too short. The Mk 1b is currently being serviced by one of the greatest living Val. 72 watchmakers, but the hand eludes us.
For me at least 2 of the sub dial hands look wrong. Second hand to short and Minute hand ends with a tip. What also needs attention for an all correct Mk1b is the red ring with a triangle shaped pointer. Regarding the red ring you can ask @SteveHarris , maybe he also has the hands? Would you please share the serial with us? Thanks!