PWCC had a real nice collection of E90-1 for sale...
Most had MK designation from PSA, but looked very nice for the grades.
here is one I won....was wondering what E collectors thought about this stamp
most were stamped JULY 10 1910. I was bidding on most because I thought this to be the most acceptable type of MK.
![](http://host.jwcinc.net/712533/brent/2013_6/101_54_2.jpg)