There are only 2 versions even though I hear about a V3
The v2 has the square window and is the most correct out at the moment. The flaws: caseback doesn't sit flush with the case. The part where the o ring sits on and connects into the case (think upside-down letter T and the o ring sits at the part the lines connect ) the part that goes into the case might be a little too long. However I've used it under water and in steam with no problems. The gap is about the size of a piece of paper
I can answer the second question. The bits on the SS bracelet cant be taken off. I think you're better off getting the ss bracelet then adding on the rubber. the ss bracelet is 100-125 while the rubber with buckle and bits are 70ish
Ive never seen a gen with the bracelet, though its not hard to do if you were to own a blackthemes gen then buy a diver and take off the bracelet
I use jewellers white rouge made for hard metals. As for polishing wheels I wish I had a table polishing wheel. I just use the regular polishing cloths you get when you buy a dremel. just dont sit too long or else the friction will cause weird marks on your polished surface