Here are two odd-ball porcelain insulators -- actual postage additonal:

1) small station post style, unmarked but neat dark glaze -- VNM -- $12 (NOT SOLD)

2) Very neat KNOX piece that appears to be glaze-welded base to top. Wild for a more modern style -- has a metal pin in the base so I suspect it is not threaded -- radio treated to boot! VNM -- $20 (SOLD)