Pyrex Percolator on stove? Does anybody use a vintage Pyrex percolator on their stove?  Electric? Gas?  Is it 100% safe?  I just saw it in an old movie, which is what gave me the idea to look for one.
Pyrex percolators made after 1940 were not intended to be used directly on a heating element as stoves made after 1940 had a higher burner heat level that those made in previous years. (Presumably, those made before 1940 were placed directly on a burner.)

The Pyrex percolators I remember had a wire 'grid' or 'heat spreader' that was to be placed on the burner and then the percolator sat directly on that. If memory serves me correctly, they came in a variety of shapes. See below for an example.