I have a project CH27 C12 that I’m tinkering with and have been scouring the internet for black subdial hands for months. No luck of course but I see the white 321 861 hands available on a regular basis. My question is if anyone knows the mm size of the hour minute and seconds hand because this has been difficult to find. It’s just a fun project and I am using spare parts to create a running wearable piece. Regards -Scott.

 

You can always measure the poles on which the hands go.
Or go to
Ranfft.de
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?00&ranfft&&2uswk&Lemania_CH27_C12
The hands "zeiger" are listed from slowest to fastest. So hour counter 0.3, minute counter 0.25 and small second 0.2mm.