Looking For Manufacturer of This Straight Razor

[SuiGeneris]

A friend asked me to track down the manufacturer of the razor below, but I have exhausted all the resources I can think of except the forum.

I believe I have narrowed the manufacturer down to two possibilities: Germany by Weyersberg or Russia by STIZ.

My thinking about this being made by STIZ goes along the lines of - there is no 'Made In Germany' marking on the tang, and very few other identifying markings. STIZ was created in 1950 and carried the MARS trademark (link below). The '50' on the tang may be a manufacture/export date.

STIZ, USSR STRAZORS.com - all about classic razors - ???? (STIZ), USSR. and
http://straightrazorpalace.com/srpwiki/index.php/STIZ

The Razor In Question

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Example of the German made MARS

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Any thoughts?