Why not? Those 2 model series have not had drastic changes for a long time except for changing the C5 and C3's respective case sizes from 38 and 40mm to a uniform 39mm. They have been in the CW stable of watches for a long time.... No idea what a C3 or C5 is
C5 = the original dressy CW watch in a sub-40mm case. Clean simple lines, circular date window. The later handwound variation was in a 40mm case but the case shape and simplicity of the dial remained. This is the original Malvern.
C3 = has always kind of been the dressy quartz chronograph version of the C5.
Doesn't seem a stretch to guess that CW are now refreshing the 2 lines to bring in the new case design a la Grand Malvern, and redesign the dial due to the new logo.
Whether or not there will be an auto C3 - that's the bit that really interests me.