Testobolin is Alpha Pharma's enanthate line, and this is the ampoule form of it: ten units at 250 mg/ml. The maker's cartons carry a verification code, which is part of why this brand comes up so often whenever packaging checks are discussed.
Chemically the content is testosterone with a heptanoic acid ester - long enough to hold the hormone back for days rather than hours, which is what places enanthate among the depot androgens. The solution is oil-based and meant for intramuscular administration; sealed single-use glass means nothing is kept once a unit is opened.