MY OWN "Surgical Steel"
Marketed to women for shaving their "parts". At the time this graphic probably seemed fairly risque with the lady shaving her armpit and all.
Pioneer Merchandise Co NY NY
Standard Blade Co NY NY
The derby trademark was bought out during the great DE mfg collapse after the introduction of injector blades and today they are made in Turkey (and still danged good blades) but back in the day, Derby was a well-known brand made right here in the USA