can I ask you why after everyone has provided you feedback on the rubbish case, are you still using it for a project?
Looking that the retainer / rehaut, it doesnt appear to be one suitable for a plexi - that looks more designed for a sapphire. Google what a genuine 5513 case looks like and you will see what i'm referring to.
Why don't you buy a cartel 5513? the case is constructed similar to a genuine watch and not expensive. It will also come with hands and dial which you could recycle.