This is a Gold Crown I. I don't think that they had this feature. Gold Crown III's and IV's have larger wooden skirts which hide the pockets but look ugly.
You can see where it was removed in your picture. They have a small spacing where they are attached and it is visible in the discoloration on your table. It must have been removed long ago maybe, they often get broken and are taken off. See photo below.
Actually now that I think about it, it would not be possible to get to the rail bolts with the skirts still on the table if all the plastic parts were there. The plastic skirting goes under the table almost all the way to the legs. So it is some what of a moot point, you would have no choice but to take the table skirts off to cover it.