[S] Nikkor 50mm 1.8 AI (S?) (USA-SoCal)

Selling a Nikkor 50mm 1.8, not sure if AI or AI-S as I have no idea how to identify both. Will come with back cap and UV filter, I do not have the front cap, will be packed on a leather lens pouch as well. Would like $60 dollars shipped anywhere in the continental US. Payment through paypal

Pics: http://imgur.com/a/7tpqb