Sir,
the pictures you have posted are of an iPhone 4. I'll prove it to you!
I have an iPhone 4S myself, I know the differences between a 4 and a 4S very clearly.
Kindly see this picture: 
It clearly shows that an iPhone 4S has 2 strips on each side and none on the top side whereas, iPhone 4 has only one black strip on each side and one strip on top near 3.5mm jack.
Now here are the pics you posted:


I don't see any 2 strips on each side and I see a black strip on top! It's evident that it's an iPhone 4... Now it's up to you if you want to believe it or not!
I wouldn't be surprised if you didn't know this yourself before...
Anyway no offence sir, just stating the facts!
Regards