I have a type II Curta (#557178) It has Six decimal markers on the top Counter and Product Register. There are only Three decimal markers below the Setting Register. Can someone confirm that only three markers were supplied below the setting register?
Thank you,

Mike

PS I suspect there may be 3 markers for each register?

It varies. My early Type II has 6 on top and 5 below. The 6/3 split for yours is normal for the Serial Number.

http://www.vcalc.net/cu.htm#variations