Elgin ?

[Archie Sturmer]

Front sprocket looks to have 48 x 1/2" teeth, (and not 52 or 26); but not sure when the 3-R's design started.

The straight down tube is a relatively older style of frame, with the curved down tube advertised as new for the higher-end models of Rollfast bikes, for 1942

The K-X serial number stamps are peculiar, guessing that they might indicate 1942.

One might check for evidence of any other fastener holes that may have been covered.

A red "E" style Excelsior Mfg. Co. badge, with the vertical fastener holes might fit?

 

[Gary Baldi]

Would this be an appropriate time to reference the list that @100bikes posted?

View attachment 2437638
Athlete, Harvard, Overland, Peerless, Princeton, Roamer, Rollfast, and Standard were Horizontal hole badges from what I remember...

Thanks to all for the great info, im kinda thinking its good news as i feared i might have to source a Johnny Cash "one piece at a time" Headbadge (older members will know what i mean) - I`ll try to find more leads from that serial number