Mr. Kaeshammer sent this picture of a "H. Wezel" knife in the Tuttlingen Museum. Note that Heinrich Wezel is listed above Johannes Wezel, Alt. And so, although it is not marked with Tuttlingen it probably is true that the spelling variation of "Wezel / Wetzel" was used.

Mr. Kaeshammer sent me this e-mail: Yes I have an image of a butcher knife made by Wezel. I shot a photo in the Tuttlingen Museum. Without „t“. I am quite sure that in the early 19th they wrote Wezel and later they added the t. As many names changed during these times. Many people wrote like they wanted. Like they listened to it. For them it was right. Regards.

IMG_0910.jpg (19.85 KB, 93 downloads)
H. Wezel knife from the Tuttlingen Museum.
1866 Tuttlingen Tradesmen 001.jpg (36.82 KB, 93 downloads)
1866 Tuttlingen Tradesmen, Heinrich Wezel.