No Zippers, all horizontal buttons. The buttons are either wool covered or, what I think may be wood.
All seams are fully closed. Jacket is lined in a Black, very thick but refined cotton? twill that has a sheen to it. The sleeves are lined an off white (natural undyed cotton it looks to me). There is one pocket inside the tail coat it is a vertical right pocket.
The pants are lined in the same natural cotton, but at the waist and a few other key points that appear to be lined in a thick, textured, very high quality silk (almost like that found on 30s to 50s formal gowns) sort of what is in the back ground of very fine brocades. The pants have a watch fob slit pocket on the right and two vertical slit pockets in front. Every inch of both garments is surges, stitched, closed hemmed or pinked. There is not a spot that is not carefully finished.
Look at the hand writing on the inside pocket.
I hope these help.
Sorry for the fuzz and fur in the pics. My cat came and sat on the tux, when I went to refill my coffee.