The word Depot in the name is doing the describing here. BM Pharmaceuticals applies it to its long-ester testosterone, supplied as ten ampoules of 250 mg/ml. BM is an Indian producer whose catalogue leans towards ampoule presentations and plainly named older products.
What Testovorin Depot-250 contains is testosterone enanthate in oil. A depot preparation forms a reservoir at the injection site and gives the hormone up gradually instead of all at once, which is precisely what the enanthate ester is bonded to it for.