Since this is an older display piece, it has been modified from its screen-used condition. Earlier in this thread, JediDave explained that there are some detail pieces missing, and some that were added for the display. The original detail pieces will need to be investigated further.
All measurements that I am providing are approximate, taken using my trusty Mark 1 Eyeball, but they are pretty close. The table was in a large glass case, preventing me from using a ruler.
Overall Table Dimensions:
The table top is circular, 35 in total diameter, including a rounded edge that is 5 in diameter. It sits on a cylindrical pedestal 14 in diameter and 26 high, which, in turn, sits on a circular base that is 23 in diameter and 2 thick. The base has a bevel that starts 1 away from the pedestal and tapers down to 1 thick at the edge of the base, ending in a 1 diameter roundover. (See figure 1)
The tabletop has a playing area that is 24 in diameter in its center, with a checkerboard pattern of black and silver on it. The playing area appears to be a sticker or thin sheet of painted aluminum applied to the main body of the tabletop. The tabletop has 2 player areas that each occupy a 90-degree arc of the table edge directly across the table from each other. The player areas, for the purpose of this post, are designated as the red and blue sides. Each player area has a set of 27 keys and 13 lights, plus the aforementioned missing detail pieces. On the Red side, the lights are dark red (of course), and the keys each have a sticker on them that has a text character in white on a black background. On the Blue side, the lights are blue and the keys have stickers with black text on a white background. The dimensions and spacing are identical for both sides. (See figure 2)
The Player Areas:
The profile of the player areas is peculiar, with an inset rounded piece that has the keys, lights, and detail pieces attached to it. It is difficult to describe the actual shape of the profile, so I will direct you to the following figure and the photos that I posted on my Photopoint page, the link for which can be found in one of my posts earlier in this thread. The outside corners where the outer diameter of the table meet the inset of the player area are rounded over in a 1" diameter chamfer. (See figure 3)
The keys in the player area are made of wood (several in the display were cracked) and have profile cut in them. They keys appear to have started out as a 1 square piece of stock that had an angle cut in it with a table saw and then had a rounded lip cut on a router table. The angle on the front of the keys appears to be about 30 degrees. The stock was then cut in 3/4" wide sections. The keys are evenly spaced along the lower edge of the inset. The text sticker that is on the top of each key is square with rounded edges and has about 1/16 of space between the edge of the sticker and the edge of the key. (See figure 4)
The lights are approximately 3/8 in diameter and 3/8 high. They have a slight taper from the bottom to the top, and they have a thin metal ring at the bottom the same diameter as the lens. There is also a bezel that is slightly larger than the diameter of the lens that is below the metal ring.
General Construction and Painting:
The tabletop appears to be made of several pieces of vacu-formed plastic that are mounted on a wooden subframe. The subframe is visible on the bottom of the tabletop. The pedestal is of an unknown material. It may be plastic, or even paper Sonotube. The base appears to be made of wood.
The whole unit is painted metallic gray. The paint has a thick look to it, like automotive paint or RoboCop armor. Since this is a display piece, it may have been repainted in a non-accurate color, so further investigation is required to nail down the actual color scheme. The playing surface on the top of the table has flat black squares on a brushed aluminum background. The keys appear to be painted a different silver than the rest of the table. It looks like your basic Krylon or Rustoleum silver.