The Delco 828 is the last version of the Argus Model M, produced by a Philadelphia company which bought the dies from Argus after WWII. The construction of the camera was simplified by making the lens mount rigidly fixed, and the lens was now a two-element design rather than the Anastigmat triplet in the original design by Gustave Fassin.
My Delco 828 is in pretty nice shape except for a missing rear viewfinder lens. In order to use the camera I found it helpful to remove the front view lens as well so I would have a clear if restricted view of the subject.
As the photos show, the Delco is capable of making some nice images with the two-element lens stopped down. The central portion of the images seem about as sharp as those from the Model A triplet.
Unlike the triplet, however, the sharpness of the image falls off sharply toward the edges. Keeping that in mind, it is still possible to get perfectly acceptable images if the primary subject is placed appropriately in relation to the background. It is basically the mind-set required for using a box camera.
Opening up the Delco's lens to its f9.7 maximum aperture causes the whole image to go soft. That still might not have been a deal breaker for the original users who were most likely getting back wallet-sized prints from the local drugstore. Bigger enlargements, however, are out of the question unless you are in pursuit of a 19th Century pictorialist style.