e3d uses this scheme to mark the size of their nozzle:
How do I read this scheme? Do we read the second row of dots after completing the first row of dots or we read 1 dot from row 1 and second dot from row 2 the again 3rd dot from row 1 and 4th dot from row 2?
It can be seen here in the nozzle:
Other nozzles usually have size engraved on the hex flat face:
Which one of these is a better scheme to designate a nozzle? is one cheaper to machine than other?