[Arran]

I guess that the pattern cut into the grille is supposed to be a stylized letter "S" even though it's on it's side. What sort of tube types does it use? It looks like it uses screen grid tubes like type #24s, probably a pair of #27s as well, and either #71AS or #45s for power outputs. Give the tubes it likely uses the chassis layout is a bit of a throwback, the power supply is in a separate stand alone box like you would find in a 1926 to early 1929 AC set. Most sets that used screen grid tubes had the power supply built into the same chassis like the Philcos did.
Regarding the leather hinge/surround on the speaker, Stromberg Carlson used that on some of their speakers until 1938. Though I haven't needed to do so I read that you can cut up a car washing chamois to replace it, it's the same sort of thing and light weight leather material.
Regards
Arran