German Boobytrap Mechanisms

ZZ42

WWII vintage Pull igniter.  This photo shows a wide variety of the ZZ42 demonstrating how widely wartime manufacture can vary.

This appears to be a German BZ39 igniter for the stick grenade.
 
DM29 Friction igniter DM31
   
 Zf Zf SpBu 37 "C.A. Zeitzunder" . 

1 white band is 1 hour delay, 2 is 2 hrs and so on.