With Lincolns and Jeffs I would call most ms67s a 4/5 on luster but some dates, especially the late 30s for example, can be occasionally found with absolute blast luster or a 5/5. I assume it must be the same with Buffs but are they harder to find? Or do I just not look at Buffs enough in person? Or does the nature of the design taking up most of the coin cause the flashiness to not manifest in a way as to be described as blast or headlights? Anyone have a 5/5 and photo that represents the difference with a typical 4/5? I don't think any of coinfact's photos quite describe the difference. I guess if they exist some of those ms68 38-d's would have to be among them.