Cutting down to one watch out of these four: 36mm OP, IWC Mark XII, Zenith a384, Zenith a3817. What would YOU keep?

I've been lucky enough to have these four beauties in my life at one point. It's a long story but I can only have one for now.

Leaning towards the a3817 because the tri color dial is what I love most about Zenith. At some future date I hope to reunite with either the IWC or the Rolex.

Torn between the vintage charm and silky bracelet of the Mark XII and the mesmerizing blue dial of the Rolex I love the most.( 16710 Coke is second and modern 36mm DJ with fluted bezel and jubilee is third…

Cutting down to one watch out of these four: 36mm OP, IWC Mark XII, Zenith a384, Zenith a3817. What would YOU keep?