In the days before the overlapping blade was developed fan companies made fans quiet by decreasing the speed by a third while adding 50 more blades. This fan is an emerson 27666 which was made from 1919 to 1922.
Emerson 77646 Al Fan 1850150614
Emerson Electric Fan 77646 Al Vintage Theunitel
Tubetime Blog Archive Emerson Fan Blade Removal
It is a 12 inch fan and it has six blades instead of the usual four.
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Vintage Emerson Electric Desk Fan Type 6250 D Young Again Fans