Two prorotypes for "Fern" were created for Thomas Glenn Holidays, and neither of them went into production.  The "A" version features a darker blue background and some smaller, ornamental ferns around the top of the ball.  Only a few of these prototypes are available.
The "Fern - A" Ball Ornament - Prototype
	
Part of the High Design & Christmas Past collections
	
Handcrafted in Poland
	
Made from glass
	
Approximately 4 inches tall (10cm)
	
Includes original manufacturers box and packaging
	
Made by Thomas Glenn Holidays