Ernesto,
You are right with the Desi comment.

These never were true congas. The adaptation I made would be well suited for Batucada Samba or Street Candombe style play. The shell is light weight (not correct shape for Candombe) and the tone is perfect. The shell does resemble a Samba Rebolo drum in all aspects after changing the head. A REMO Bahia bass head would be perfect for the shell.
Keep it fun,
Jerry