Do take note that the way the rubber strap is attached to the rep is very different than the gen. Then gen has just the regular spring bars. However, on the rep, other than the spring bars, there are two small holes on the case itself. The rubber straps edges/ends have 2 metallic parts protruding out that go into these holes. This is done to prevent the rubber strap from bending too much when wearing the watch.
So, if you do take out the rubber strap and put on a regular leather strap - you will have 2 holes visible on the watch case on either side. You may want to take out the rubber strap to reconfirm this.
I have the reps in steel, black and gold and also the gen in gold.
Cheers