~~~ (denomination, serial number or whatever) being central and all else, especially the monetary unit, being to the left or right where the numeral, alone, can be central or the combination of denom and currency being central.

This is the first time I have ever seen a serial number on a chip saying it's a number... On very few engravings a street number would say it's a number as well.

The "CH" = Cercle Haussmann.