This is an ad from, as Thomas Dolby put it, the Golden Age of wireless. More literally, it’s from the October, 1916, issue of The Electrical Experimenter, a Hugo Gernsback publication, which you can flip through here, on archive.org. Don’t forget: “You benefit from mentioning The Electrical Experimenter when writing to advertisers.”
Looking up the price in an inflation calculator, it says $60 in 1916 was worth what $1,694.25 will get you today, and the after-October-1 price of $75 in 1916 is now, more than a century after October 1, worth $2,117.81. I guess we missed out on some significant savings.