I had a crappy Wilkinson on a Godin I used to own.
I've found out since that Wilkinson 50's (V50? VS50?) were a crappy Wilkinson that won't stay in tune, and the 100 series is the 'good' Wilkinson that is rock solid.
Mine probably had the 50 series
Interesting to note too, that Carvin, and now Kiesel, still use the crappy 50 series Wilkinson, even though their comminty over on their forums have been saying for years now that the 100 series is a much better bridge unit. You would think that a company would use the better bridge if their customer wants it, but whatever...