It is interesting to use the zoom features and see the original pencil lines. The inking on the S shield is very vague in some panels.
(I'm sure Rao is going to move this to the K-Metal thread)
Yup - the biggest detraction for me of the time period is that ever changing "S". On the project we established the non-serifed "S" early on - and kept it. The 5 sided chevron was already established by our project, and it just seemed like a small leap to make the "S" non-serifed - then into the checked serif as the chronicles progress, too the basic pattern of the squared serifed "S" that pretty much stayed the same since.