Does the A303 case have loops inside?
I would want to put 5 items in it, but they are all slim (4 x Lamy Logo ballpoint, 1 x Logo pencil), and the total width is under 50mm, so if there are no loops, it would be fine.
Also, what's the difference between this and the A203?
There are no loops, but there are two dividing flaps. The flaps will lie down, but are designed to keep the pens separate. If the case is used to hold more than three pens the pens will touch and could become marked. Having said that, the case will hold your 5 pens.
The A303 and A203 pen cases are of the same design, but the A303 is made of a higher quality, fine grain leather. The A303 also features a ribbed embossed finish on the flap, whereas the A302 uses the same leather throughout.