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+ 1 on the above.
I cant explain how frustrating it is to sharpen a razor that just wont get there and then you find the back or blade sometimes shift!

My thought to, it looked kind of funny!
As goldsmith I'm scared of anything lead, it you get it on your tools, you will get it on the jewellery and then there will be trouble!

I've seen one with a lead back, almost sorry I didn't buy that one... but I wouldn't want lead on my hones.

If you want an original back piece, you can probably find a blade in bad condition really cheep and take the back from it.

Or use tape, lots and lots of tape!

There was a thread about making a new back for one of these a while back.