I also have the stem nut mounted style. I bought it off EBay for about 1\2 the price of the previously suggested site. It's actually a lot better quality than I was expecting. Not real sure on the waterproof level but you can always pop the clock out of the base when you give her a bath if your worried about it. If you ride much after dark I suggest getting the illuminated model. I love mine!
2006 V-Star 1100 Classic
Silverado windshield and passing lamps
OE Highway bar with custom mounting brackets
Kuryakyn Dually ISO Highways pegs
Barons Nasty Boy Slip-ons
Kuryakyn led headlight halo