This is our OVERSIZE evancio pen. 16mm barrel, 18mmcap, 14mm section and deeply postable. The deep posting prevents the pen from being unbalanced when writing.
We LOVE Jonathan Brooks' line of blanks, but we don't use them often because they are favorites of many custom makers, and now multiple commercial makers. However, when training our newest maker to single point thread our evancios, we broke these out of blank storage.
If you've ever wanted a Hinze pen in PM1 .. now would be the time to grab one.