Explanation on the bras and model numbers:

Unlike other manufacturers whose model numbers are unique, Samanta uses the same model numbers over and over. To identify a bra correctly, you need the name and the model number in combination.

The numbers behind the name of the bra designate the cut. Models with the same number have the same cut.

The name designates the design, ie the colours and the fabric used.

Blogger MissUnderpinnings wrote a detailed explanation: http://www.missunderpinnings.com/2013/04/guide-to-samantas-constructions.html