1913-1921 Enclosed pinion spool housing. It has been media blasted and it appears to be crack free. The inner bearing sleeve is in pretty rough shape and should be replaced.
$40 plus shipping in the U.S.
This would make a good core for the Fun Projects bearing spool of yours is cracked.
Last I checked there is a $75 core charge for this style if you don't have a good core.
$35 plus free shipping in the U.S.