Eric Hedrick had recenty located and published the 1759 German signature of Valentine Metzger (aka Valetine Butcher and several variations of Metzger including Metcher, Mitscaw, etc.) in the Hans Colly aka John Colley probate in his Original Documents series for the residents of the South Branch in then Augusta County.
Another original signature of Metzger's can be seen on-line
in the Chancery documents at LVA see the PDF:http://www.lva.virginia.gov/chancery/full_case_detail.asp?CF...
It contains a digitized copy of the original deed in which Valentine "Metcher" mortgaged the land he'd purchased (from Peter Miller) to Charles Rush and Lodowick Francisco.
In the suit, Valentine is named both Metcher and Butcher (the translation of Metzger to English) but his own spelling in the deed is " Metzger " in German. (see page 11 in the Chancery PDF for the signature).
The two Augusta Co. signatures compare favorably.
It is however difficult to read the very cramped signature of Georg Metzger on either of the oaths' list of the Loyal Judith in 1742,the man whom family researchers favor as the immigrant and said to be aka Georg Valentin Metzger. Both the immigrant signatures have a downward slant to the right and each contains a closed "g". Neither of the exemplars of Valentine Metzger in Augusta County records slant downward and both have a "g" which is open at the top. This comparison - the four signatures - is one that probably should be left to an expert.
LVA is still in the process of uploading the early chancery files for Augusta County (which covered the Pendleton and Rockingham Cos. areas. The files are nicely digitized in PDF format but are often tedious reading - most in the dozens of pages and there is no easy way to tell if someone on the surname list is mentioned just in passing or whether there might be important genealogical material for a given surname or even a contemporaneous signature.