Graded-division algebras are building blocks in the theory of finite-dimensional associative graded by a group G. If G is abelian, they can be described, using loop construction, terms central simple graded-division algebras. On other hand, given finite abelian G, any G-graded-division algebra over field F determined, thanks to result Picco and Platzeck, its class (ordinary) Brauer isomorphism ...