This is an early 1890s unmarked 1-piece brassie.  It is exceptionally well made and older than most.

There are a number of items that set this 1-piece club apart from those produced by BGI, Spalding, and John Duncan Dunn. For starters, its head shape is completely different from these others.  It is distinctly "blocky" and less refined. In the eyes of the auctioneer, this brassey was likely made before these three versions.  Consider also that the head is thicker top to bottom and more elongated. An opening in the back of the head, where lead was likely deposited, is filled with a piece of wood that fits flush with the surface of the head. No other 1-piece wood has that feature. 

The first US patent for a golf club was applied for on February 10, 1893 by Gustav Ruemmler.  Rummeler called for his wood to be made without a neck joint.  He believed a 1-piece wood would prevent the club from being broken at the neck, and because there was no neck joint it could not come apart. He also called for his club to have a few layers of wood on the top and bottom of the head in order to make the head stronger and less susceptible to fraying from impact. The brass plate on the sole does add durability to this club.

The first British patent for a 1-piece wood was applied for on July 18, 1891 by Andrew Morison.  This is over 2 years before Ruemmler.

Patents can be produced in full or in part, but there is no proof that this club has anything to do with Gustav Ruemmler or Andrew Morrison.  But Ruemmler and Morrison show that 1-piece clubs were in the world of golf long before BGI and Spalding were even in business.  The lack of a name on this club should not be seen as a detraction.  It is actually evidence of the early nature of this club, and that it was made by someone who was not into marketing as much as simply wanting to produce a club from a single solid piece of wood.  His effort, more exploratory as opposed to sales oriented, was a resounding success! This is a great club!