I'd expect that the lens is best set for midway between infinity and the near focusing limit. This because that will give better performance than having it right at one end of the range and very wrong at the other.
FWIW, I have a 1912 vintage 130/6.3 CZJ Tessar extracted from a Folding Pocket Kodak. It is unit focusing, shoots very well on 2x3. I expect that yours will please you.
Which Kodak camera did yours come from? I ask because the f/6.3 Tessar, both Zeiss and B&L, was a premium lens in its day and was fitted to EKCo's top-of-the-line cameras. All of the cameras in catalogs at
http://mgroleau.com/catalogues_kodak/ that had f/6.3 Tessars had unit focusing lenses. Also, if yours is echt Zeiss, not B&L, EKCo last used Zeiss lenses, at least in North America, in 1915. I've seen mid-20s Kodak UK folders with Zeiss lenses, all unit focusing.
1915 and earlier Tessars in EKCo (North America) cameras were all in Compounds. What shutter is yours in?
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