Q: How can I find my Mac book Pro model? example = A12??

The model number will be on a sticker placed on the original box and is also on the bottom of the laptop. How to find the serial number of your MacBook Pro - Apple Support <- applies to model number too.

If it is still needed, the model identifiers are listed here: How to identify MacBook Pro models - Apple Support

-AJ

Have you looked on the bottom of the case? The Axxx designation is listed there.

Get yourself a magnifying glass. Or maybe a microscope.

The model number is printed on the base of the MacBook Pro in the text alongside the various standards/certifications. Unfortunately, Apple choose to print the text in 4pt font, in grey on a silver background. It's like they seriously never expect anyone to actually need to read this information.

Alternatively, plug your serial number into http://www.everymac.com/ultimate-mac-lookup/ to get a breakdown of the model, including it's Apple model number.