I inherited my great-grandfather's straight razor from my grandfather 8 years ago when my grandfather died. At the time, I stuck the shaving kit (razor, strop, brush, mug) in a box and never thought about it again. Until Halloween weekend, when a friend and I dressed up as Sweeny Todd (demon barber of Fleet St. and Ms. Lovett), and I used the razor as a prop for my costume. I got several comments on it, and that led me to try and find out it's value. This search led me to your forum. It is a solingen 7 and the other side says KLIHASO in an elipse of triangles. There was writing on the blade, but it is very faded and I can't make it out. The top of the blade is about 1/8" thick, rounded, and with diagonal lines with circled dots along the surface. The handle is 4 sections of 1" mother of pearl pieces separated by 1/4" abalone pieces, on both sides. I have the box for it, it is red and says weitzer cutlery Co., Milwaukee, WIS. Made in Germany, and the other side says cutlery, grinding and barber supplies. I have no idea on it's age except for that my great grandfather was born in 1900 and my grandpa said he got from his father (my great-great-grandfather) when he began shaving, about 1915 or -16 (?) Any help or insight would be much appreciated!