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You are welcome. Being a machine translation explains why I am finding it hard to understand but we will get there eventually.

There is the "hot pin" test for ivory. See post #4 in this thread ...

A full/true wedge blade is a rare thing as they would be impossible to hone in a normal manner. The closest to a full/true wedge you normally get is a near wedge blade. Yes, a lot of people to find...

No need to be sorry. Looks like you have a roughly 9/16 sized razor which is on the small side for a normal sized razor. There are 3/8 sized razors but I believe they are mainly used for trimming...

STRAZORS.com - all about classic razors - Wheatley Brothers, Sheffield.

I'd check your width of the blade measurement again. It looks bigger than 9mm in the photo.
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