Postby agphile » Sun Jan 17, 2010 8:46 am
The three assay office marks are in a stub. There will have been a range of stubs for different sizes and types of silverware. I have always understood that variations in the orientation of the individual marks in a stub were a safeguard against fakery. If the marks from a smaller item were cut out and inserted in, say, the bottom of a larger coffee or teapot, it would be immediately obvious to the expert that the marks were wrong.
I am no expert on Birmingham silver of this period, but this does seem to me more likely as an explanation than simply the whim of the punch cutter.