The typeface suggests the early days of the horseless carriage, prior to World War I, but the text points to a later era. Clarence Birdseye introduced the first commercially viable frozen-food technology in the mid-1920s; "frozen food" would have been an attraction to private home-owners and apartment-dwellers only with the retreat of iceboxes and the widespread availability of refrigerators, a decade or so later. (The mention of "beer" likewise rules out any date prior to 1933, and the end of Prohibition.)
A reasonable guess would be that J&M dates to the years just after World War II, and that the typography was meant to give an old-timey feel and evoke a slower-paced, simpler time.
J&M Food Market
Surviving signage on Rogers Ave. at Carroll St., Crown Heights, Brooklyn