old vintage machine shop reamer adjustable multi blade display brass era etmore

Description

18E152201 up for sale is a very old Etmore reamer head ,this would have taken replaceable HSS blades now missing but the tools is a nice vintage machine shop collector piece , marked Etmore and also stamped with two patent numbers pat no 1621227 and 1700896 these might be complete although some of the undercut might have removed some of the original markings ,also there is another number stamped on the tool that is 7.D.6.1.A then 1 3/4 electro eteched by hand , has a 1 1/4 back diameter with a through slot 1/4 wide to drive it then a 0.622 through hole , very unique tool ,
comes as shown in photos