Pharmacom Labs abbreviates hard on its labels - Test for the hormone, P for the ester, 100 for the concentration - so the full reading of this one is testosterone propionate at 100 mg/ml in a 10 ml multidose vial.
Pharmacom prints a verification code on its packaging that can be checked against the manufacturer's own register, which is part of why the brand is recognisable to people who read labels closely. The vial gives ten millilitres from one stoppered bottle, and the ester inside is the short-acting one: testosterone released quickly after injection and cleared at a similar pace.
