My suggestion would be , make the design for the hand, the submariner hand style. the other most important point is , 100 mtr/200 mtr /300 mtr water resist?
And , for the achieving of 200 pcs, how about getting on the groupon or any other deal a day website, to grab more ppl's attention?
And then, setup a blog to update on the project??and name the project. So that we got a name for the watch?