VAM 28 - Doubled Profile is a pairing of Obverse Die 17 with Reverse Die a.  Obverse Die 17 is associated with VAMs 28. and 23 and both have the descriptor of a "doubled profile."  Over the years three different versions of VAM 28 were identified and these are designated as 28.1, 28.2, and 28.3.

This VAM is not easy and it takes some analysis to distinguish the dies used for classification.  As of this writing in December of 2021 we have two examples of Die 1, five examples of Die 2, and fifty-five examples of Die 3.  Even though dies 2 and 3 were identified later, once Leroy made the designations and we went back through all our coins most fell into the Die 3 category.

So what are the specific descriptors for each die?

Die 1 - The Liberty head profile is slightly doubled from the forehead to the chin. The phrygian cap is weakly doubled at the top edges.  There is a spike in the upper loop of both eights.  There is a die marker of a scratch at the back of the eye at the hair line.

Die 2 - Die chip at top left inside of the left 8 upper loop.  There is a die marker of a diagonal die scratch below the right rear of the Phrygian cap.  There is a reverse die marker of a polishing line on the second inner feather from the bottom of the eagle's left wing.

Die 3 - There are lines and pitting in the eagle's left wing-neck gap.  There is a diagonal polishing line in the R of LIBERTY.

We published a guide for quick identification of each die on the VAM 28 page and it can be referenced here.  Quick Reference Guide

We have only two examples of Die 1.  One is a DMPL 60 and way too early to have developed die cracks or breaks.  The other is a Mint State 61 and appears to be an early strike that has no die cracks or breaks.