Reproduction WWII German Enigma Machine Button Head Top

For sale is a reproduction button head top [as listed in the blueprints, but we would call it a metal rim] that was used with the German WWII Enigma machine.  These button head tops/metal rims are being sold individually.  This button head top is made of AISI304, a type of stainless steel.  Each button/key stem requires a button head top, and the second picture shows the engraved letter and button head glass, both sold separately, that sit within the button head top.  The last picture shows how the button head top does not quite contain the engraved letter and button head completely, so for aesthetic purposes the purchaser may forego buying the button head glass.  As with the engraved letter and the button head bottom, each button head top will require a weak adhesive to keep the button head top in place around the engraved letter and button head glass.  Each individual button head top weighs 0.1 oz.