I haven't shared anything from the collection in a while, and since you don't see these very often, here you go -- 2 Pfennig Yacht Proofs of the German Colonies.

The lowest-value Yacht stamps that were used throughout the colonies were the 3 pfennigs, which are brown.
These are proofs of a 2-pfennig design in gray-blue. There are 5 total:
MiNr I P 1 (Samoa)
MiNr II P 1 (Cameroon / Kamerun)
MiNr III P 1 (German Southwest Africa / Deutsch-Südwestafrika)
MiNr IV P I (Carolines / Karolinen)
MiNr V P (German New Guinea / Deutsch-Neuguinea)
MiNr I-IV were printed in blocks of 16, arranged as follows:
DSWA - DSWA - Samoa - Samoa
DSWA - DSWA - Samoa - Samoa
Karolinen - Karolinen - Kamerun - Kamerun
Karolinen - Karolinen - Kamerun - Kamerun
As such, they can be found in roughly equal numbers, and they share the same catalog values.
The German New Guinea issue is a bit of a mystery to me. Michel lists it in the catalog, but I can't find any mention of it in any of the usual references. Michel doesn't give it a CV (--.--), so it's rare enough that they're unable to establish a value. Have to keep my radar up for that one, and the DSWA that I'm missing!