Isn't my iphone backcover original?

My i phone 4 backcover says

Designed by Apple in Califonia
Made in China Model No: A1332

then there's a only one symbol… Something like letter I attached to letter C it looks like ' IC'
then there's a code APA-A1332(B)

IPhones i have seen has 3 or 4 symbols on the back cover and written "Assembled in China" not 'Made in China"
I'm sure that iphone is a original one… I just want to know whether backcover is a fake or not… Please help…

Just had a iPhone 4S that arrived, so took a look (bear in mind this is the most recent stock BUT it's 4S) and it says;

Designed by Apple in California. Assembled in China.
Then there's the model code.

Checked my friends iP4 & other friends 3GS and both say 'assembled' not 'made'