Tin/bismuth alloy. Modern day plumber's solder? How did you shape the wedge? Did you melt the solder and cast it? I wonder if it would cast in a round ball mold. I just use a hammer to flatten a lead round ball into a wedge shape and usually have a wedge .025 on the thin wedge to .080 on the thick end for a near wedge blade. I find it really easy to control how thick I want the finished wedge.
The wedge I reduce in size until it is about .010 proud and assembled with micro fasteners. I also do not finish the lead wedge until after I have the razor pinned. I then file and sand the wedge flush with the scales. Finally kiss the edges on a buffer to re-polish the scales but stay off the wedge. The result is no rolled over appearance of the scales or wedge where the wedge and scales meet. A clean sharp parting line between the pieces.
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