Well, you have to know that, if I remember it well, ALL the Duometre à Q.L saw their price increasing this year.
If I'm not wrong, the YG and RG are more towards 28 K euros, now, while the WG is 32 000 Euros, which makes a difference of around 15 %.
I would also offer the possiblity to the future owner to decide on which buckle he wants to have, for this price.
I'm not a big fan of the folding buckle, which I personally find uncomfortable, and much prefer the simple buckle.
But I would reduce the gap between the RG and the WG if I dediced to go for the WG and its simple buckle, which, therefore, is nicely designed.
It looks like a Vintage one, with the applied JL Logo.
Best,
Nicolas.