I like the simplicity of that Storm Crow compass, but in general, I just don't like liquid-filled button compasses. A few weeks ago, I exchanged emails with Vaughn Neeley about compasses. He, too, is frustrated with the current button compasses that are available and has occasionally made his own dry compasses for his knives, which he says is a real headache. Here is an updated photo of my mini compass collection. Recently, I was able to add the Waltham compass after years of searching.
1) Karl Mfg., .25" brass, dry, non-luminous, USA (1990s)
2) Waltham, .50" brass, dry, non-luminous, USA, used by Randall (early 60s - early 70s) and by Lile in the original 13 First Blood knives
3) Marbles, .50" brass, dry ,non-luminous, USA, used by Timberline (late 80s)
4) Pyser-SGI, .60" brass, dry, luminous, England (? - present)
5) Marbles, .75" brass, dry, luminous, USA, used by Timberline (early 90s)
6) Tokyo Compass, .55" plastic, liquid, luminous, Japan, used by Randall (late 90s - present)
7) Marbles, .50" brass, dry, non-luminous, USA, used by Randall (mid 80s - late 90s)
8) Marbles, .50" brass, dry, luminous, USA, used by Randall, Lile, and Timberline (70s - mid 80s)
9) Marbles, 1" brass, dry, luminous, USA (mid 90s)