I have got more information on this subject, taken from Bernard Henry, a french author who is an authority in the subject of the sling. Well, the research on cestrosphendon is progressing with the collaboration of Johnny and Dan
, at least theoretically although it is necessary to experiment to validate the theories 8).
B. Henry, when describing the pouch of the Roman sling, refer to the word "scutale". He says that the word is of dark origin and considers three possible origins:
The Roman origin, according to which scutale would come from "scutum" = shield;
The Greek origin, according to which it would come from skytos = thong of leather.
The Etruscan origin (predecessors of the Romans), according to which would come from the root "scu..." and means to contain, to support, and then scutale would be the place where the stone is leaned or put.
He affirm that being dark the origin of the word scutale, finally has concluded that scutale would specifically mean the strap of leather of the sling, but understood like the strap that forms the pouch. This seems to me plausible since to designate simply a leather strap the names of LORUM and HABENA were used normally. Since in all Roman Literature scutale appears only twice, in Livy, and in the context of the sling, it is necessary to think that it is an adapted word or almost invented by him, and therefore is necessary to look for a contextual meaning. Henry analyzes the two texts that contain the word and by its meaning it concludes that scutale talks about the pouch of the sling made of leather, as it seems that it was the Roman sling. That pouch could be of several designs, as the one of an only piece or the one of several braided strips of leather, like was the Achaean sling in his opinion, etc.
As for me, I had bet by the Latin origin, scutum derivative, since I had compared several Latin words with the same root and a meaning with certain similarities:
Scutum = republican shield, made oval and concave
Scutella = cup
Scutula = dish.
All of them talk about a concave and rounded surface.