All that and more in this week's edition of Hodinkee's What's Selling Where column. Given that May 1st is celebrated as International Workers Day, it seems almost compulsory to reward yourself with a little mid-day Mayday watch ogling, right? Congrats, Baller, you've done it again. Happy Friday. Scorekeeping last week's picks: the Certina Argonaut chrono went for £1,620, the Vacheron Constantin 6394 for £7,400, the IWC Mark XII for £2,400, and the Cartier Coussin for CHF 42,000. Everyone's encouraged to take a closer look at this , described as an "18k Vintage Vacheron Constantin Geneve Quartz Watch," and let's take a moment to collectively register the fact that, in the pictures, the second hand has clearly moved, so either a) the battery's still got some life in it after all (impressive!), or b) maybe it's not quartz. Mr.…