The last time I saw that razor was on Ebay and I was bidding on it, but I didn't go very high because I couldn't see any markings in the photos provided that proved it was a Wacker. Nice razor none the less.
Guess I outbid you...sorry...hehe.
Like I said, I don't know if the etchings on the blade was Herr Wackers' doing or what.
Also, does the hot pin test apply to horn like it does ivory?