Avanti
Look Ma, No Hands!
My ELGIN has MOD which=1939...My frame is not like yours my rear chain stay is one piece yours has two bars ,forks are different also,,Can't get pics right now,, will post at a later date,,,,WEEBOB....https://en.wikipedia.org/wiki/Murray_(bicycles)
Interesting. Perhaps Murray dropped the "O" for some of their sub-brands like Derby. It would be great to determine what the rest of the numbers indicate.