In 1986, the Demou father and son duo bought an abandoned Sterling Streamliner (In 1978, it was the first ever diner to be listed on the National Register of Historic Places.) and moved it to its current location on East Avenue in Pawtucket, Rhode Island. (thank you JS for tipping me to the Stickney streamlined design of diners!)

It is believed that 16 of the the famous Sterling Streamliner diners were produced by J. B. Judkins Co. of Merrimac, MA. (1857-1942) between 1939 and 1942. Sterling bought the design from Roland L. Stickney in 1939.

 Stickney was a REALLY good illustrator that I posted about, and showed a lot of his car catalog art in Mar 2023 https://justacarguy.blogspot.com/2023/03/roland-stickney-was-premier-illustrator.html

The first produced was a prototype and did not have a name fired into the porcelain enamel panel on either side of the front door, as was the standard. The shortest ever produced was 41.5 ft. long, and the longest 54.5 ft. long. 

 At least one is known to have been in production around the time of the bombing of Pearl Harbor on Dec. 7, 1941. 

Production of diners ceased immediately after the US declaration of war. The Judkins company closed its shops in 1942 and all buildings (offices and manufacturing) were sold and later demolished. The last Streamliner diner was never completed but sat outside the Judkins factory for years. Aside from the Modern Diner, and Salem Diner, four (4) others still survive in one form or another in storage. In order of production these are: Hesperus (406) Streamliner (4011), Jimmy Evan's Flyer (4012), and Lindholm's (4017) Note that all 4 of these were produced in 1940.

https://www.atlasobscura.com/places/modern-diner

https://patentroom.com/sterling-streamliner-diner