Thrasher re: v1, v1.5, v2
Black Gen and v2 White Rep, noticeable difference between these two are the bezel, dial lettering and Omega coronet. Subtle differences are the hour indicators and the hands. I can't tell on yours but how is the crystal? I recall in the v1, some crystals exhibit a de-laminating effect. Oh, and the other 'duh' is the movement but you can't tell unless you're setting the date / time.
Regarding Ploppy straps, you can get those from Chrono24 and Swiss watch spares. A good alternative can be found from strap maker Bonetto Centurini. I think Amazon carries one of their straps.