Some say the Alemite grease fittings began about 1937;
and they are depicted in the 1936 Golden Jubilee Sears Catalog.
In the late 1930's Sears was supplied primarily by Murray and Westfield, I believe that both of those two manufacturers
also supplied bikes with the Alemite fittings. But I believe that the primary, Murray did
not build double drop bar frame motorbikes; as they started in 1936 with more
streamlined designs.
The truss fork, crank & sprocket, and frame,
all look like Emblem Manufacturing Co., Angola NY; and there are few other examples.
Looking for a 26" boys straight bar Elgin bike from the mid to late 30s. Must be original paint in any condition.
thecabe.com
Wasn’t planning to sell but some things came up. Nice solid prewar Elgin. Rides nice!! $595 plus shipping to the lower 48.
thecabe.com
Swapping Emblem crankset parts with non-Emblem parts can be challenging, because of the fairly wider offset dimension of the drive pin, (and perhaps the shaft & cone diameters too?).
Not a whole lot is known about Emblem
serial numbers, (say, compared to Murray or Westfield, etc.); but your example can be tied to the 1936-38(?) timeframe, which could
help others in determining the age of their Emblem bicycles within +/-1 year, (instead of +/-10 years).