This watch has a centre sweep hand but the depth of the back case will not accomodate the movement it is too shallow. You will notice the centre sweep gearing is not in place, I have a spare movement which the appropriate gearing will be canibalised to provide and complete the movement. I have a deep affection for this watch and wish to see it completed before I fall off my perch. I have thought long about a solution - if I have the back case depth increased by having a see through crystal with a deep enough curve to give a depth which would make it work. Does anyone on the forum know of a company or individual which would be able to make the alterations needed. Thanks in anticipation.