When I first saw this, I was away from home and couldn't pin down the date. You know, at some gin mill or den of iniquity(was at a coffehouse/bakery, then a party where I had a Mexican Coke from a taco truck). Now I'm home and have cut the grass for the first time, and I have access to Richard Lichtfeld's "The History of the Peerless Automobile Company", 2009. Lining up the MSRP's from the ad you found, the Coupe pictured is a 1919.
Both in the ad and book, the 4 pass. Coupe is $3,320...7 pass. Touring Car $2,760, 7 pass. Sedan $ 3,530.