Judging by the numbers that have survived the 28 and the slightly more expensive 27 were two of Conway Stewart’s most popular pens. Apart from the width of the cap band, they’re pretty near identical and come in the same colour patterns.
This is the burgundy or plum hatched variety of the 28. Plum seems more appropriate to me. The hatch is a beautiful pattern but the red versions are often faded by now. The visible areas look a little dull and there’s a sliver of the original brightness hiding under the cap. This one’s completely unfaded and presents the original glory of the pattern.
The 28 tends toward the long and slender. Perhaps not quite as much as the 85L (I don’t have one to compare at the moment) but more elegant-looking than, say, the stockier 85. It shows in the length of the clip as much as in the combined length of body and cap. To my eye the 85L looks a little stretched. I think the 28 has it just about right.