In reviewing the basic handshapes of the Ethiopian Manual Alphabet (actually a syllabary), I found this handshape.
It's a variant of a D handshape where the three other fingers form a curlicue on the thumb.
I am working with an Ethiopian Deaf man here in Virginia, and it is definitely a unique handshape.
As it is in neither the 1 or the 5 handshapes in ISWA 2010, I'm not sure how to teach it in terms of computer reproduction, as any rotation would have to be manually created with that extra index finger added.
Drawing is easy, computer manipulation is not, and as it is an essential part of the Ethiopian Sign Language, I'm stumped.