I picked this Giesen & Forstoff up (blade only) very recently in a batch of pretty decent razors from eBay, quite an attractive looking blade with the worked tang.
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I couldn't find info. for this particular model, my best guess would be 1940's/1950's.

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I thought it deserved something classy so opted for probably my favourite scale material - black water buffalo horn and a more contemporary form.
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A bit of work with the fretsaw and drum sander...
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The scales were shaped before final sanding so the process would soften the edges a little (from 800 thru' to 2500 grit)
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I used a piece of 2mm aluminum for the wedge and to maintain the black and silver theme I used 1/16" nickle silver pins at the wedge & bushes at the pivot with brass bearings, well pleased with the finished result!
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I believe Giesen & Forsthoff are still and business but their modern razors are somewhat inconsistant in quality however I'm glad to say that this one honed up no problem at all and is a pretty decent razor.