Chosen Solution

Does anyone knows the LCD display reference for a for the MacBook Pro 15" mid 2012 (MD103LL/A) Non Retina?

If you are talking about the LCD reference itself, it depends since Apple use different panel suppliers. A search for A1286 LCDs will show compatible LCDs since they do not have to be the same as the original reference. An example of one however is LP154WP3