touchmark

Etymology

From touch + mark.

touchmark means the manufacturer's official identifying sign, impressed into a pewter object. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

The manufacturer's official identifying sign, impressed into a pewter object.“For quality control, Parliament in 1503 required all London-made pewter to be stamped with the maker's symbol or touchmark.”
A symbol, sign, or other inscribed indication used to aid the alignment, calibration, or other adjustment of a measuring device or scientific instrument.“The instrument used was a refracting telescope by Dollond. . . . The cap containing the diaphragm was furnished with a touch-mark consisting of a projecting spoke. When in adjustment as described above this mark was parallel to the short side of the parallelogram.”