Thanks Ed

Bob,
Thanks for you interest. The base was made, the edge parts cut from an old table top and the top from the side of an old wardrobe. I don't have anything special for cutting the angles just a small and quite old but functional bench saw.
The case itself is 3mm float glass cut to order. The place I use now 'machine' cuts glass so it's very accurate but before I would just stress that actual dimensions aren't too important but that the two long lengths need to be identical. Squareness is 'built in' on assembly.
Here's a couple of pics that might help
The glass is bonded using Loctite Multibond. A simple fixture to hold the two long sides the correct distance apart is made from pieces of white faced particle board. The only important thing to watch is squareness at the two ends.

The end pieces are about 1 mm shorter than overall width to ensure no overhang and to provide an area for a fillet of glue to form. The catalyst is sprayed on the flat and the glue applied to the edges. The work time is a few minutes and the bond immensely strong after a few hours. The top dimensions are also 1mm short on both sides to give the same effect.

The base dimensions are made to suit the glass inner dimensions as finished. This ensures that it fits without tightness or too much slack. The mitre corners were cut using one of those hand powered mitre saws. The timber is glued on using the same adhesive for the glass. The glass is quickly masked and the catalyst sprayed along the edge just wider that the timber section. The adhesive is applied to the wood. Parts are held by hand and masking tape - grab time is about 2-3mins

Finish is just a three layers of french polish rubbed back with wire wool. It pays to mask the glass for this as cleaning the polish from the glass is a real pain if you don't

Took about five days start to finish - just a hell of a lot longer to get round to it

I've used this method to do cases from hand held size to one that's near 5 feet long to hold a model ship. It's not a difficult process and it helps to have the means to cut wood - that said, there are sections commercially available that could be used
Hope that answers your questions Bob
Regards - Tug