Reproduction WWII German Enigma Machine Button Head Glass

For sale is a reproduction button head glass [as listed in the blueprints, but not made of glass] that was used with the German WWII Enigma machine. The button head glass is made of acrylic plastic and they are being sold individually. Each button/key stem can use a button head glass to protect the engraved letter, but it is not mandatory. The second picture shows the engraved letter and button head glass, both sold separately, that sit within the button head top, and as you can see the button head top does not quite contain the engraved letter and button head glass completely, so for aesthetic purposes the purchaser may forego buying the button head glass. My engraved letters are thicker than the original Enigma letters. If you use a weak adhesive to seat the engraved letter on top of the button head bottom, and inside the edge of the button head top the button head glass will seat properly. Each individual button head top weighs 0.1 oz