Here is a Tiffany Studios #801 green slag glass and bonze grapevine design stamp box.  It is about 1 1/2" high and it is 2 1/4" x 4 1/8" across. It still has the original little ball feet on the bottom.  It is marked with Tiffany Studios New York on the bottom.  I can see the numbers 80 so I assume it is a 801.  It is very hard to read the name and number but they are there.  It looks like someone etched something on the one side edge as well.  There are no cracks or breaks.  I have personally had this in my display cabinet for over 40 years.