Ford:

For this example only, the probability is very, very high that the mark RS denotes compensation & liability for Robert Schlegelmilch. There is a small probability that there was another Robert Schlegelmilch. The marks are not just meaningless. When a sufficient number of examples are seen w/ the same stamps, a correlation or probability can be associated w/ the stamps. All it takes is some sourcing relationship & that will tip the scales for the preponderance of evidence. We may not be be able to equate a set of initials to a mechanic 100% but it can approach that. Axel E. gives the jagged encircled K to mate w/ Klett and their family tree.

Cheers,

Raimey
rse