Interesting add. Note the recommended dosages. Very small. 2.5 mg/3 times a day (t.i.d.)
Methyltestosterone, an oral anabolic steroid is mentioned which was approved for use in 1936.
Here's the pre-dianabol list of available stuff -
Androsterone - (Schering - 1934)
Androfort (Richter - 1936)
Testosterone Propionate - Sterandryl (Roussel - 1936)
Testoviron (British Schering - 1936)
Virormone (Paines & Byrne - 1936)
Perandren (Ciba - 1937)
Neo-Hombreol (Organon - 1937)
Pantestin (Richter - ?? *at least 1941)
Erugon-S (Bayer - ?? *at least 1941)
Methyltestosterone - Metandren (Ciba - 1940)
Perandren Linguets (Ciba - 1940)
Glosso-Sterandryl (Roussel - 1941)
Neo-Hombreol-M (Organon - 1941)
Oreton M (British Schering - 1942)
Oraviron (British Schering - 1942)
Viromone- Oral (Paines & Byrne - 1942)
Testosterone Cypionate
Depo-Testosterone (Upjohn - 1951)
Methyl Testosterone being sold through an ad in Popular Science in 1948 -
http://books.google.com/books?id=fiYDAAAAMBAJ&pg=PA258&dq=methyltestosterone+hudson&hl=en&sa=X&ei=1niVU5r7CcqdyASxo4CAAQ&ved=0CDQQ6AEwAQ#v=onepage&q=methyltestosterone%20hudson&f=falseFDA stops it's OTC sale around 1950 or so.