In reading an on-line copy of an old National Association of Retail Druggists trade publication, I came across this vintage ad dating to 1919 and thought I'd post it:

Although this ad is dating back 92 years, it is not as old fashioned as we might think given the US Postal Service is now trying to encourage local merchants (including drug stores) to provide postal services so as to enable the closure of limited use post offices throughout the country.