Bought this on EBay just a day ago. The razor looked to be in good shape. Although not uncommon, I have only seen a few Erns with a worked spine.:
Name: Ern worked spine.jpg Views: 166 Size: 9.7 KBName: Ern Mignon_Page_1.jpg Views: 166 Size: 14.7 KBName: Ern tang_Page_1.jpg Views: 163 Size: 13.4 KBName: Ern 1600_Page_1.jpg Views: 164 Size: 11.4 KB